Description
IceCap 75 GPD RO/DI System — Compact Power, Big Results
The most compact system in the IceCap RO/DI line — built for reef keepers who want pure water without giving up shelf or stand space.
Nano tanks and small-to-mid reef setups don't need a commercial-grade RO system taking up half the stand — they need clean, reliable water in a footprint that fits. The IceCap 75 GPD System delivers up to 75 gallons of pure, 0 TDS water per day, more than enough for weekly water changes and top-off on most nano and small reef setups, without the size or cost of a higher-output unit.
It's built on the same 4-stage filtration and Dow Filmtec membrane technology as the rest of the IceCap line — so you're not sacrificing water quality for a smaller system, just scaling the output to match your tank.
Why Reefers Choose the IceCap 75 GPD
- 75 GPD output — right-sized for nano and small reef systems
- 3:1 waste ratio — standard efficiency for entry-level systems
- Dow Filmtec TW30-1812-75 membrane — 96–98% typical salt rejection at 65 PSI
- Color-changing DI resin — see exactly when it's time to refill, no guesswork
- Auto shut-off valve — stops water flow automatically once storage is full, no wasted water or flooded floors
- No electricity required — runs entirely on household water pressure (65–80 PSI)
- Compact footprint — 16" x 6.5" x 18", fits easily under most stands
Built For
- Nano and small reef systems where a compact footprint matters
- First-time RO/DI buyers who want reliable output without paying for capacity they don't need
- Hobbyists doing standard weekly water changes on a single display
- Anyone with 65–80 PSI household water pressure ready to start with clean, stable water
What's Included
Auto shut-off valve, manual flush flow restrictor, glycerin-filled pressure gauge, refillable DI cartridge, and all installation fittings and tubing — everything you need to get up and running.
Specs at a Glance
| Spec | Detail |
| Model | IC-RI75 |
| Output | 75 GPD |
| Dimensions | 16" x 6.5" x 18" (L x W x H) |
| Waste Ratio | 3:1 |
| Salt Rejection | 96–98% |
| Membrane | Dow Filmtec TW30-1812-75 |
| Water Pressure Required | 65–80 PSI |
| Power Required | None |
| Filter/Canister Size | Standard 10" |
| Fittings | 1/4" push-connect |
Growing your system or adding more tanks down the line? The 100 GPD shares the same footprint with more daily output — worth a look if you expect to scale up.
Standard 10" canisters and 1/4" push-connect fittings mean replacement filters are always easy to find — no proprietary parts, no supply headaches down the line.
Backed by CoralVue's standard warranty. Questions before you buy? Contact us — we run these systems ourselves at our own coral farm.
Compare IceCap RO/DI Systems by GPD
| 70 GPD | 100 GPD | 150 GPD | 200 GPD | |
| Model | IC-RI75 | IC-RI100 | IC-RI150 | IC-RI200 |
| Best For | Nano & small setups | Growing tanks, frequent WCs | Larger displays, multi-tank | Frag farms, high-volume ops |
| Waste Ratio | 3:1 | 3:1 | 1.5:1 | 1.5:1 |
| Salt Rejection | 96–98% | 96–98% | 96–98% | 96–98% |
| Membrane | Dow Filmtec TW30-1812-75 | Dow Filmtec TW30-1812-100HP | Dow Filmtec (150 GPD spec) | Dow Filmtec TW30-1812-100HP |
| Water Pressure | 65–80 PSI | 65–80 PSI | 65–80 PSI | 65–80 PSI |
| Dimensions | 16" x 6.5" x 18" | 16" x 6.5" x 18" | 16" x 6.5" x 18" | 16" x 6.5" x 18" |
| Power Required | None | None | None | None |
Not sure which size is right for you? As a rule of thumb: match your GPD to roughly 3–5x your weekly water change volume so your system keeps up without running constantly. Low incoming pressure? Every model pairs with the IceCap Booster Pump Kit to hit peak output.
Warranty & Support
CoralVue and IceCap guarantee this product to be free from defects in material and workmanship. View full warranty details →
Have a question or need to submit a warranty claim? Visit the CoralVue Support Portal →