Those units have smaller DI
cartridges than more expensive units. This just means that the DI
will be exhausted quicker. The 100 gpd membrane is also less efficient that the 75 gpd membrane. I think there is a 100+ membrane that has a 95% or more rejection rate like the 75 gpd membrane but the 100 gpd membranes typically have a 90% rejection rate. This also means that the DI
will be used up faster.
Not saying that these units are bad but sometimes you can get a unit with better internals for a similar price. I started with a unit similar to that and now have clear canisters, a dual DI
unit and a 75 gpd membrane. The clear canisters can be bought separately and are not more fragile than the others. It is nice to see how dirty your sediment filter really is.
*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,