Ok we use to use distilled, then saw that the drinking water was actually ro so switched. We'll try the distilled again. I dont have a tds meter, boy I thought horses were expensive this reef thing can get crazy too haha. Well on a positive note, with the thorough cleaning of the filter, rocks and sand, and the addding of phos remover things are looking much better, but I do want to try to solve the underlying problem so it doesnt come back.
It's only expensive when you start..........or upgrade.
Horses IMO.....are way more expensive.