
75P Standard
A 75 cm tank with room for plants behind larger pieces of wood and stone.
Authorized UNS dealer · Tallahassee, FL
Explore Ultum Nature Systems aquariums, matching stands, and aquascaping gear at Underwater Tropics.
Start with the space you have. Measure left to right and front to back, then leave room above the tank for a light and for maintenance.

A 75 cm tank with room for plants behind larger pieces of wood and stone.

A low, wide tank with the filter built into the back.

A 90 cm tank that’s only 30 cm front to back, with a frosted blue background.
Open a tank style to compare dimensions and listed capacity. For all-in-one tanks, the capacity includes the filter chamber.
Room for a layered layout, with space behind the wood or stone.
Narrow front to back, with more room to work from side to side.
Low sides make it easier to reach the bottom or let wood rise above the water.
| Model | L × D × H | US gal |
|---|---|---|
| 5S | 14.17 × 8.66 × 4.72 in 36 × 22 × 12 cm |
2.5 |
| 25S | 9.84 × 9.84 × 5.11 in 25 × 25 × 13 cm |
2.1 |
| 45S | 17.71 × 11.02 × 7.08 in 45 × 28 × 18 cm |
5.9 |
| 60S | 23.62 × 14.17 × 7.08 in 60 × 36 × 18 cm |
10.2 |
| 90SS | 35.43 × 22.04 × 9.84 in 90 × 56 × 25 cm |
33.2 |
| 90S | 35.43 × 22.04 × 14.17 in 90 × 56 × 36 cm |
47.9 |
The filter is built into the back or end of the tank. The product page shows what’s included.
Square footprint, with the same length, depth, and height.
| Model | L × D × H | US gal |
|---|---|---|
| 16C | 6.29 × 6.29 × 6.29 in 16 × 16 × 16 cm |
1 |
| 20C | 7.87 × 7.87 × 7.87 in 20 × 20 × 20 cm |
2.1 |
| 25C | 9.84 × 9.84 × 9.84 in 25 × 25 × 25 cm |
4.1 |
| 30C | 11.81 × 11.81 × 11.81 in 30 × 30 × 30 cm |
7.1 |
| 40C | 15.74 × 15.74 × 15.74 in 40 × 40 × 40 cm |
16.9 |
| 45C | 17.71 × 17.71 × 17.71 in 45 × 45 × 45 cm |
24 |
| 50C | 19.68 × 19.68 × 19.68 in 50 × 50 × 50 cm |
33 |
Small rectangular tanks for tight spaces.
Extra height for upright wood or plants.
| Model | L × D × H | US gal |
|---|---|---|
| 16T | 6.29 × 6.29 × 9.44 in 16 × 16 × 24 cm |
1.6 |
| 3T | 12.20 × 7.48 × 9.44 in 31 × 19 × 24 cm |
3.7 |
| 20T | 7.87 × 7.87 × 11.81 in 20 × 20 × 30 cm |
3.1 |
| 25T | 9.84 × 9.84 × 14.17 in 25 × 25 × 36 cm |
5.9 |
| 5T | 14.17 × 8.66 × 11.02 in 36 × 22 × 28 cm |
5.8 |
| 30T | 11.81 × 11.81 × 17.71 in 30 × 30 × 45 cm |
10.6 |
| 45T | 17.71 × 11.02 × 14.17 in 45 × 28 × 36 cm |
11.9 |
| 60T | 23.62 × 14.17 × 17.71 in 60 × 36 × 45 cm |
25.6 |
Fully mitered glass with a fitted lid. See each listing for its features.
| Model | L × D × H | US gal |
|---|---|---|
| Prism 20TM | 7.87 × 7.87 × 11.81 in 20 × 20 × 30 cm |
3.2 |
| Prism 25TM | 9.84 × 9.84 × 14.17 in 25 × 25 × 36 cm |
5.9 |
| Prism 30TM | 11.81 × 11.81 × 17.72 in 30 × 30 × 45 cm |
9.7 |
A frosted blue back panel. Dimensions match the standard finish of the same model.
Pick the cabinet by tank model. These are the stands and matching tanks in our catalog:
Want both? See tank and stand kits. The 75P comes with a choice of Jet Black or Natural Wood kits. Each listing shows what comes with it.
Check the hose size when replacing tubing or adding an inline diffuser. Rated circulation is the more useful number for comparing filters in use.
| Model | Tank rating | Rated circulation | Hose size |
|---|---|---|---|
| Delta 30 | 16 gal | 60 gal/h | 12/16 mm |
| Delta 60 | 27 gal | 90 gal/h | 12/16 mm |
| Delta 90 | 66 gal | 120 gal/h | 12/16 mm |
| Delta 120 | 92 gal | 200 gal/h | 16/22 mm |
Browse Delta filters and tubing
See the rear filter and return in a real setup. The video also shows the smaller 45SA.
See the frosted blue back and what the long, narrow footprint looks like planted.
Also watch the 90SS aquascape, Prism 25TM terrarium, and Controsoil walkthrough on their product pages.
We’re on Capital Circle NE, a short drive from I‑10. If you’re coming in from Lake City, Thomasville, or anywhere else in North Florida or South Georgia, give us a call before you get on the road. We’ll check whether the tank or stand finish you’re after is in the shop. All purchases are made in store.
Underwater Tropics
1891 Capital Circle NE, Suite 08
Tallahassee, FL 32308
(850) 296-8608
Regular hours: Monday–Saturday, 10:30 a.m.–7 p.m. Closed Sunday.
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