LF well used RO system

[Myka]

There are chloramines here too, and I can remove them entirely just by using a single 0.1 micron carbon block. The bigger micron carbon blocks are not as efficient. Be aware though, that you will have water contaminated with ammonia once it goes through the carbon filter.

Is your tank a reef or FOWLR? Are you most concerned about the waste water? I'm just wondering why you don't opt for the RO system when you say the tapwater is so terrible. There are lots of options for use of the waste water. It's fairly simple to hook up a system to use the waste water in your washing machine.