Dive into the Deep!
Unearth the Hydro Crystallization Station

Relive the classic 1998 Hydronauts theme with this 483-piece set! Explore the depths with 5 minifigs and discover the secrets of the Hydrolator crystal.

🏛 Hydronauts
Set #6199

Hydro Crystallization Station

The Hydro Crystallization Station is a classic underwater exploration set.

Before you buy

Who it's for
Intermediate build LEGO fans and collectors who appreciate classic themes and underwater adventures.
Build
482 pieces · about 4.5 hours Build time is an estimate.
Availability
Likely retired
★★★★☆ 4.0 community rating

Fans appreciate the set's nostalgic value and unique underwater theme, but some find the design simplistic compared to modern LEGO sets. The color scheme and minifigures are well-received, though the play features are considered basic.

📝 Our Take

AI-assisted editorial summary, grounded in our LEGO database and public community discussions. How we use AI

The Hydro Crystallization Station is a classic underwater exploration set. Released in 1998 as part of the Hydronauts theme, it captures the adventurous spirit of LEGO's deep-sea adventures with its vibrant color scheme and unique play features.

This set is perfect for LEGO enthusiasts who appreciate vintage themes and enjoy building underwater bases. The set offers a moderately challenging build with a good balance of playability and display value, making it a great addition to any LEGO collection, especially for those nostalgic for the late 90s LEGO era.

Skip this set if you prefer modern, highly detailed models or are looking for complex building techniques. While charming, it lacks the sophistication of contemporary LEGO sets; consider newer City Deep Sea Explorers sets for a more up-to-date underwater experience.

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🧱 Building Experience

AI-assisted build estimate, grounded in our LEGO database and public community discussions. How we use AI
🧩
482
Pieces
⏱
4.5h
Estimated Build Time
📊
Intermediate
Difficulty
Build Highlights:
  • The use of octagonal pieces to create unique shapes.
  • Integrating transparent green elements to simulate crystal formations.
  • Designing a modular base with multiple connection points.
  • Incorporating play features like the crystal transport mechanism.

📈 Investment Analysis

AI-assisted investment analysis, grounded in our LEGO database and public community discussions. How we use AI
Not enough price history for a trend
B
Investment Grade
⏳ Retired
The Hydro Crystallization Station presents a moderate investment opportunity. As a set from the late 90s, it benefits from nostalgia among older LEGO fans. Its rarity and complete sets in good condition command a premium. However, the Hydronauts theme isn't as universally popular as some other classic LEGO themes like Space or Castle, which may limit its appreciation potential. The presence of multiple minifigures adds value, but their commonality across the theme mitigates individual worth.

Not Financial Advice: Content is for educational purposes only. Past performance doesn't guarantee future results. Full disclaimer

⚖ Compare Similar Sets

Compared to modern underwater sets, the Hydro Crystallization Station has a simpler design aesthetic. Sets like the LEGO City Deep Sea Explorers series (e.g., 60096-1) offer more advanced building techniques and detailed models but lack the retro charm. Collectors might choose this set for its nostalgia and uniqueness, while those seeking cutting-edge design may prefer newer alternatives.

5 Minifigures Included

The set includes five minifigures: three Hydronauts and two Stingrays. These figures are common across the Hydronauts theme, with standard diving gear and faction emblems.

📦 Parts Inventory

Official piece count
482
Parts cataloged in this inventory
125 unique parts, 462 pieces
Minifigures
5

LEGO counts 482 pieces. This inventory comes from a separate parts catalog and lists 485, including the 23 parts inside the minifigures; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.

String with End Studs 41L Overall String with End S...
Part #: 14226c41 1× Black
Wing, Tail 4 x 1 x 3 Wing, Tail 4 x 1 x 3
Part #: 2340 2× Black
Brick 2 x 2 Corner Brick 2 x 2 Corner
Part #: 2357 2× Red
Panel 10 x 10 x 12 Quarter Dome Panel 10 x 10 x 1...
Part #: 2409 2× Trans-Green
Tile Special 1 x 2 Grille with Bottom Groove Tile Special 1 x ...
Part #: 2412b 13× Black
Tile Special 1 x 2 Grille with Bottom Groove Tile Special 1 x ...
Part #: 2412b 7× Yellow
Windscreen 6 x 6 Octagonal Canopy with Axle hole Windscreen 6 x 6 ...
Part #: 2418b 1× Trans-Green
Windscreen 6 x 6 Octagonal Canopy with Axle Hole and Hydronauts Print Windscreen 6 x 6 ...
Part #: 2418bpr0001 1× Trans-Green
Plate 2 x 2 Corner Plate 2 x 2 Corner
Part #: 2420 1× Yellow
Tile 1 x 4 with Groove Tile 1 x 4 with G...
Part #: 2431 8× Yellow
Bracket 1 x 2 - 1 x 4 [Square Corners] Bracket 1 x 2 - 1...
Part #: 2436 1× Black
Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] Plate Special 2 x...
Part #: 2444 2× Blue
Brick Sloped Inverted 75° 2 x 1 x 3 Brick Sloped Inve...
Part #: 2449 7× Black
Brick 1 x 2 x 5 with Blocked Open Studs and Bottom Stud Holder with Asymmetric Ridges Brick 1 x 2 x 5 w...
Part #: 2454a 2× Black
Brick 1 x 2 x 5 with Blocked Open Studs and Bottom Stud Holder with Asymmetric Ridges Brick 1 x 2 x 5 w...
Part #: 2454a 2× Yellow
Brick 2 x 6 Brick 2 x 6
Part #: 2456 1× Light Gray
Brick 2 x 6 Brick 2 x 6
Part #: 2456 2× Black
Brick Special 1 x 2 with Pin Brick Special 1 x...
Part #: 2458 1× Light Gray
Tile Special 2 x 2 with Top Pin Tile Special 2 x ...
Part #: 2460 1× Yellow
Brick Wedged, Sloped 3 x 3 x 2 Facet Top Brick Wedged, Slo...
Part #: 2463 2× Yellow
Brick 1 x 16 Brick 1 x 16
Part #: 2465 7× Black
Brick 1 x 16 Brick 1 x 16
Part #: 2465 4× Light Gray
Tool Chainsaw / Drill Body Tool Chainsaw / D...
Part #: 2516 2× Black
Plate Special 1 x 2 Side Handle [Free Ends] Plate Special 1 x...
Part #: 2540 2× Black
Plate Special 1 x 2 Side Handle [Free Ends] Plate Special 1 x...
Part #: 2540 3× Yellow
Animal Body Part, Shark Body, without Bottom Tube Animal Body Part,...
Part #: 2547 1× Dark Gray
Animal Body Part, Shark Head Animal Body Part,...
Part #: 2548 1× Dark Gray
Tile Special 1 x 1 with Clip and Straight Tips Tile Special 1 x ...
Part #: 2555 2× Blue
Panel 3 x 4 x 6 Curved Top Panel 3 x 4 x 6 C...
Part #: 2571 2× Trans-Green
Hinge Panel 2 x 4 x 3 1/3 with Silver and Black Grid Print Hinge Panel 2 x 4...
Part #: 2582pr0004 2× Trans-Green
Brick Special 1 x 2 x 2 1/3 with Spring Unit Brick Special 1 x...
Part #: 2605c01 2× Black
Brick Special 1 x 1 with Handle Brick Special 1 x...
Part #: 2921 2× Black
Lever Small Base with Yellow Lever Lever Small Base ...
Part #: 298c01 2× Black
Lever Small Base with Black Lever Lever Small Base ...
Part #: 298c02 2× Red
Brick 2 x 4 Brick 2 x 4
Part #: 3001 3× Light Gray
Brick 2 x 4 Brick 2 x 4
Part #: 3001 3× Yellow
Brick 2 x 3 Brick 2 x 3
Part #: 3002 2× Blue
Brick 2 x 2 Brick 2 x 2
Part #: 3003 4× Yellow
Brick 2 x 2 Brick 2 x 2
Part #: 3003 5× Light Gray
Brick 1 x 2 Brick 1 x 2
Part #: 3004 1× Blue
Brick 1 x 2 Brick 1 x 2
Part #: 3004 5× Yellow
Plate Special 6 x 8 Trap Door Frame Horizontal Plate Special 6 x...
Part #: 30041 1× Black
Plate Special 4 x 6 x 2/3 with Trap Door Hinge Plate Special 4 x...
Part #: 30042 1× Black
Fence Spindled 1 x 4 x 2 [2 Top Studs] Fence Spindled 1 ...
Part #: 30055 2× Black
Plate Special 6 x 6 Octagonal with Opening Plate Special 6 x...
Part #: 30062 1× Black
Brick 1 x 8 Brick 1 x 8
Part #: 3008 1× Yellow
Animal, Manta Ray Animal, Manta Ray
Part #: 30084 1× Black
Brick 1 x 4 Brick 1 x 4
Part #: 3010 5× Black
Plate Special 2 x 6 with 4 x 8 Half Saucer and Stingray Print Plate Special 2 x...
Part #: 30195pr0001 1× Dark Gray
Plate 2 x 4 Plate 2 x 4
Part #: 3020 1× Light Gray
Plate 2 x 4 Plate 2 x 4
Part #: 3020 4× Black
Cockpit 6 x 6 x 3 1/3 Octagonal Canopy Base Cockpit 6 x 6 x 3...
Part #: 30200 1× Black
Plate 2 x 3 Plate 2 x 3
Part #: 3021 3× Light Gray
Plate 2 x 2 Plate 2 x 2
Part #: 3022 3× Yellow
Plate 1 x 2 Plate 1 x 2
Part #: 3023 3× Red
Plate 4 x 4 Plate 4 x 4
Part #: 3031 1× Yellow
Plate 4 x 6 Plate 4 x 6
Part #: 3032 1× Light Gray
Plate 2 x 8 Plate 2 x 8
Part #: 3034 2× Yellow
Plate 2 x 8 Plate 2 x 8
Part #: 3034 1× Light Gray
Plate 4 x 8 Plate 4 x 8
Part #: 3035 3× Light Gray
Rock 1 x 1 Crystal 5 Point Rock 1 x 1 Crysta...
Part #: 30385 4× Chrome Silver
Brick Sloped 45° 2 x 2 with Dark Screen and Blue Controls Print (Aquazone Hydronauts) Brick Sloped 45° ...
Part #: 3039pr9985 2× Yellow
Brick Sloped 45° 2 x 1 Triple with Ovoid Bottom Pin Brick Sloped 45° ...
Part #: 3048c 3× Light Gray
Brick Round 1 x 1 Open Stud Brick Round 1 x 1...
Part #: 3062b 13× Trans-Green
Brick Round 1 x 1 Open Stud Brick Round 1 x 1...
Part #: 3062b 2× Red
Tile 2 x 2 with Groove Tile 2 x 2 with G...
Part #: 3068b 6× Black
Tile 2 x 2 with Groove Tile 2 x 2 with G...
Part #: 3068b 2× Red
Tile 2 x 2 with Aquazone Silver and Copper Circular Print Tile 2 x 2 with A...
Part #: 3068bpr9881 1× Black
Tile 1 x 2 with Arrow Short Yellow without Black Border Print Tile 1 x 2 with A...
Part #: 3069bpr0038 5× Black
Tile 1 x 2 with Copper and White Circuitry, Red Rectangle and 4 Squares Print Tile 1 x 2 with C...
Part #: 3069bpr0053 2× Dark Gray
Tile 1 x 2 with Blue Windows and Bubbles Print Tile 1 x 2 with B...
Part #: 3069bpr0057 5× Yellow
Plate Special 3 x 2 with Rounded End, Hole Plate Special 3 x...
Part #: 3176 1× Blue
Technic Axle 2 Notched Technic Axle 2 No...
Part #: 32062 7× Black
Brick Sloped 33° 3 x 2 Brick Sloped 33° ...
Part #: 3298 1× Black
Brick Sloped 33° 3 x 2 with Divers Bubbles Print Brick Sloped 33° ...
Part #: 3298pr0038 7× Yellow
Plate 1 x 8 Plate 1 x 8
Part #: 3460 2× Black
Brick 1 x 3 Brick 1 x 3
Part #: 3622 2× Blue
Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Brick Sloped Inve...
Part #: 3660 1× Black
Plate 1 x 6 Plate 1 x 6
Part #: 3666 8× Light Gray
Turntable 2 x 2 Plate - Top Turntable 2 x 2 P...
Part #: 3679 2× Light Gray
Turntable 2 x 2 Plate, Base Turntable 2 x 2 P...
Part #: 3680 2× Blue
Brick Sloped 75° 2 x 2 x 3 [Hollow Studs] Brick Sloped 75° ...
Part #: 3684 5× Yellow
Technic Brick 1 x 2 [1 Pin Hole] Technic Brick 1 x...
Part #: 3700 4× Light Gray
Plate 1 x 4 Plate 1 x 4
Part #: 3710 1× Black
Plate 1 x 4 Plate 1 x 4
Part #: 3710 4× Blue
Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Brick Sloped Inve...
Part #: 3747a 1× Blue
Technic Axle Pin without Friction Ridges Lengthwise Technic Axle Pin ...
Part #: 3749 8× Light Gray
Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Plate Special 1 x...
Part #: 3794a 9× Blue
Plate 2 x 6 Plate 2 x 6
Part #: 3795 6× Black
Plate 2 x 10 Plate 2 x 10
Part #: 3832 1× Light Gray
Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment] Plate Special 1 x...
Part #: 3839b 1× Black
Hinge Brick 1 x 2 Base Hinge Brick 1 x 2...
Part #: 3937 1× Blue
Brick Round 2 x 2 with Axle Hole Brick Round 2 x 2...
Part #: 3941 6× Yellow
Brick Round 2 x 2 with Axle Hole Brick Round 2 x 2...
Part #: 3941 3× Black
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Plate Round 2 x 2...
Part #: 4032a 10× Black
Brick Special 1 x 1 with Headlight Brick Special 1 x...
Part #: 4070 4× Trans-Neon Orange
Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Plate Special 1 x...
Part #: 4081b 2× Red
Plate Special 1 x 1 with Clip Vertical [Thick U Clip] Plate Special 1 x...
Part #: 4085c 5× Yellow
Plate Special 8 x 8 with Grille [No Hole in Center] Plate Special 8 x...
Part #: 4151a 2× Black
Tile 1 x 8 with Groove Tile 1 x 8 with G...
Part #: 4162 3× Yellow
Tile 1 x 8 with Groove Tile 1 x 8 with G...
Part #: 4162 8× Black
Panel 1 x 4 x 3 [Hollow Studs] Panel 1 x 4 x 3 [...
Part #: 4215b 2× Yellow
Hinge Plate 1 x 2 with 3 Fingers [Hollow Studs] Hinge Plate 1 x 2...
Part #: 4275b 2× Blue
Plate 2 x 16 Plate 2 x 16
Part #: 4282 1× Yellow
Brick Sloped 33° 3 x 1 Brick Sloped 33° ...
Part #: 4286 2× Blue
Box 2 x 2 x 2 [Hollow Studs] Box 2 x 2 x 2 [Ho...
Part #: 4345b 1× Trans-Green
Box 2 x 2 x 2 Door with Slot Box 2 x 2 x 2 Doo...
Part #: 4346 1× Trans-Green
Brick Sloped 75° 2 x 1 x 3 with Open Stud Brick Sloped 75° ...
Part #: 4460a 9× Light Gray
Hinge Tile 1 x 2 1/2 with 2 Fingers on Top Hinge Tile 1 x 2 ...
Part #: 4531 2× Light Gray
Cone 1 x 1 [No Top Groove] Cone 1 x 1 [No To...
Part #: 4589 1× Trans-Neon Orange
Plate Special 1 x 4 Offset with Bar Holes Plate Special 1 x...
Part #: 4590 2× Yellow
Plate Special 1 x 4 Offset with Bar Holes Plate Special 1 x...
Part #: 4590 3× Black
Plate Special 1 x 2 with Bar Up [Horizontal Arm 6mm] Plate Special 1 x...
Part #: 4623 4× Yellow
Plate Special 1 x 2 with Bar Up [Horizontal Arm 6mm] Plate Special 1 x...
Part #: 4623 1× Red
Hinge Tile 1 x 4 Hinge Tile 1 x 4
Part #: 4625 2× Black
Hose, Pneumatic 4mm D. 19L / 15.2cm Hose, Pneumatic 4...
Part #: 5102c19 1× Light Gray
Weapon Harpoon [4 Grooves on Shaft] Weapon Harpoon [4...
Part #: 57467 2× Chrome Silver
Minifig Footwear Flipper [Thin] Minifig Footwear ...
Part #: 59275 4× Light Gray
Minifig Footwear Flipper [Thin] Minifig Footwear ...
Part #: 59275 6× Black
Bar 7 x 3 with Double Clips (Ladder) [Straight Clips] Bar 7 x 3 with Do...
Part #: 6020 2× Dark Gray
Baseplate Raised 32 x 32 Canyon with Gray Underwater Print Baseplate Raised ...
Part #: 6024pr0003 1× Light Blue
Brick Special Octagonal 2 x 3 x 1 2/3 Sloped Brick Special Oct...
Part #: 6032 11× Yellow
Brick Special Octagonal 2 x 2 x 3 1/3 Brick Special Oct...
Part #: 6037 2× Yellow
Cone 2 x 2 x 1 2/3 Octagonal, Open Stud Cone 2 x 2 x 1 2/...
Part #: 6039 7× Yellow
Propeller Housing Propeller Housing
Part #: 6040 2× Yellow
Propeller 3 Blade 3 Diameter with Axle Cross Propeller 3 Blade...
Part #: 6041 5× Trans-Green
Propeller 3 Blade 3 Diameter with Axle Cross Propeller 3 Blade...
Part #: 6041 1× Trans-Neon Green
Brick Special Octagonal 2 x 2 x 3 1/3 with Side Studs Brick Special Oct...
Part #: 6042 4× Yellow
Brick Special Octagonal 2 x 2 x 3 1/3 Corner Brick Special Oct...
Part #: 6043 4× Yellow
Bar 9 x 13 Grille Bar 9 x 13 Grille
Part #: 6046 1× Black
Brick 2 x 4 x 2 with Holes on Sides Brick 2 x 4 x 2 w...
Part #: 6061 1× Yellow
Plant, Bush 2 x 2 x 4 Plant, Bush 2 x 2...
Part #: 6064 3× Red
Rock Panel Rectangular 4 x 10 x 6 Rock Panel Rectan...
Part #: 6082 2× Light Gray
Animal, Octopus [Plain] Animal, Octopus [...
Part #: 6086 1× Black
Wedge Plate 6 x 6 Cut Corner Wedge Plate 6 x 6...
Part #: 6106 4× Light Gray
Brick Arch 1 x 12 x 3 Brick Arch 1 x 12...
Part #: 6108 2× Black
Brick 1 x 12 Brick 1 x 12
Part #: 6112 1× Blue
Bar 1 x 6 [Closed Studs] Bar 1 x 6 [Closed...
Part #: 6140 4× Yellow
Plate Round 1 x 1 with Solid Stud Plate Round 1 x 1...
Part #: 6141 14× Trans-Neon Orange
Plate Round 1 x 1 with Solid Stud Plate Round 1 x 1...
Part #: 6141 19× Trans-Green
Wedge, Plate 16 x 14 Shuttle Wedge, Plate 16 x...
Part #: 6219 1× Light Gray
Brick Special 2 x 2 with Pin and Axle Hole Brick Special 2 x...
Part #: 6232 3× Blue
Technic Axle 3 with Stud Technic Axle 3 wi...
Part #: 6587 1× Dark Gray
Dish 2 x 2 x 2/3 Light Reflector Dish 2 x 2 x 2/3 ...
Part #: 71128 4× Chrome Silver
Equipment Suction Cup Gun Equipment Suction...
Part #: 71594c01 2× Trans-Green
The set features a good selection of yellow and black bricks, along with transparent green elements to represent crystals. The octagonal sloped bricks are useful for creating unique geometric shapes in MOCs.

🛒 Where to Buy

💎 Notable Parts

Black Tile Special 1 x 2 Grille with Bottom Groove (13x) $1.30
Trans-Green Brick Round 1 x 1 Open Stud (13x) $2.60
Yellow Brick Special Octagonal 2 x 3 x 1 2/3 Sloped (11x) $2.20
Yellow Slope 33° 3 x 2 with Divers Bubbles Print (7x) $3.50
Est. BrickLink Part Value
$9.60

💡 MOC Potential

🏙 Expand the base into a larger underwater research facility.
🌳 Create a vibrant coral reef ecosystem.
🚗 Design custom submersibles and underwater vehicles.

Community Insights

Real opinions from Reddit and YouTube

What Reddit Says

No Reddit discussions found for this set.

What YouTubers Say

Based on 6 videos
3.0 /5
Mixed
0% positive
BlockTalk AI

The Hydro Crystallization Station (6199) from the Aquazone Hydronauts theme receives generally neutral coverage from LEGO YouTubers. Reviews focus on showcasing the vintage set's features and minifigures rather than expressing strong positive or negative opinions.

Community Sentiment

Based on 6 YouTube reviews

Reddit

Not enough Reddit data

YouTube

3.0 /5
Mixed
0% positive
0
Positive
6
Mixed
0
Critical
BlockTalk AI Analysis

The Hydro Crystallization Station (6199) from the Aquazone Hydronauts theme receives generally neutral coverage from LEGO YouTubers. Reviews focus on showcasing the vintage set's features and minifigures rather than expressing strong positive or negative opinions.

What the Community Says

4 YouTube reviews
BlockTalk AI Summary

Brick Master highlights the set's large size, minifigures, and play features in their review. Other channels, like MRN Bricks, offer simple overviews, inviting viewers to share their thoughts on the set.

Community Content: These reviews are from Reddit and YouTube users sharing their personal experiences. Opinions may vary.

📖 Building Instructions 1

Hydro Crystallization Station Instructions
BUILDING INSTR. 6199
Download PDF

Charts Inventory Statistics

125
Unique Parts
482
Official Piece Count
462
Cataloged Inventory Pieces
5
Minifigures
4
Spare Parts

LEGO counts 482 pieces. This inventory comes from a separate parts catalog and lists 485, including the 23 parts inside the minifigures; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.

Inventory Version: 1

Missing a piece? Use the Missing Piece Checker.