We have an lfs here who sells ro/di water for like $.50/g or less.
All my Fw and my 55g marine use untreated tap water with no water changes. The 55g marine has fish and soft type corals. But no luck with sps. so perhaps sps requires ro/di. But otherwise IMHO RO/DI is not needed.
And all tanks are maintained, balanced out, and stabilized with plant life. FW plants and marine macro algae.
Hopefully not nitrous oxide but n2.I'm very interested in what you say. It's not that I'm interested in duplicating your setup; It's more of a curiosity from a tank chemistry point of view.
My main question is this: You feed your fish with food I presume. And with that food you are bringing nitrogen into your tank in the form of proteins and whatnot. Unless that nitrogen leaves as a gas (such as nitrous oxide), it will always be in your tank, no? How do you stabilize total nitrogen?
Wow, that's really great!
Right now I'm using a canister filter (Fluval 205).
So I wonder now, if I were already resigned to sink $150, perhaps rather than a RO/DI filter, I could instead build a DIY refugium w/some macro algae with the purpose of maybe not eliminating all water changes, but reducing the frequency of them. I'd also have the added benefit of having a refugium and presumably higher water quality.
No worries there. I do like to here different theories, though. I'm not too interested in using tap water for my system, but I am interested in perhaps using some plants to help keep nitrate in check and reduce the amount of water changes.Don't go by one persons word ever.