Rodi unit

I guess a little free ammonia in the RO product would become digested quickly by the nitrosomes bacteria when applied to reeftank (circulation important.) I suspect my Jeaubert Plenum bed system can handle that. The bad threat would be for my ro equipment to fail and start passing chloramines into the product. I suspect a Seachem Ammonia alert and batch testing for chloramines may suit my needs at the moment. My Dowtec membrane filters Phosphate down to 12 PPB, not happy with that from a litmus test point of view. Using tap water I just now mixed a cupful of saltwater to 1.024. The PO3 is 145 ppb. My Dow Filmtec has a 92% rejection rate of PO3. The 8% Phosphate I can handle, problem is who the hell knows what else is getting through and at what rejection rate?

Time for a High Silica technology membrane at minimum.

 

RO membranes as a whole are not real effective at removing phosphates, silicates and all forms of ammonia.

Spectrapure treats all their membranes with a special proprietary process then guarantees their Select series to be better than 98% rejection rate overall but even theirs is only a slight impovement over dry untested membranes on things like that. They do a better job on silicates than any other but its still not 100% effective and why they have spent years and thousands of hours developing their SilicaBuster DI resin blends. There really is a difference.