I’m very confused about gh, kh, and tds. I used RODI water to fill up my tank while it was cycling. Now I’m reading that just RODI water has no minerals and will kill fish and plants if I only use that… I have plants in there for around two weeks and all are fine and some are growing a lot. The only thing I have been adding to this 10 gallon tank is dr tims ammonia and flake fish food. My cycle is complete now but I’m just confused as to what I should do about this gh, kh, and tds levels which should be at zero because I’m using RODI water. Can anyone explain how to fix this?