[32Bit_Fish]

Quote: Originally Posted by KathyC Your question made me curious and since I also have planted FW tanks, I decided to check a few of mine. First I tested my tap water - it's 44 Then I tested 2 FW planted tanks they came in at 97 and 102..which in my opinion is just fine. They both had water changes done over the weekend and I am definitely NOT aiming for perfectly clean water as that is not necessry nor positive for those planted tanks. Rodi water is not desireable for FW tanks. Tap water treated with a properly dosed chloramine/chlorine neutralizer is fine for FW planted or unplanted FW tanks. Obviously other parameters should be adjusted to the requirement of the breed/s of fish you own. One other thing to keep in mind, the addition of Stress Coat dramatically changes the TDS readings. When I added 2 drops of SC to a 7 oz cup of tap water the TDS reading shot up to 121. When dealing with a SW tank, ideally you want your Rodi water to at 0 as it comes out of the Rodi unit.

oh. so my planted tank water is cleaner than yours.
I dont use Stress coat and just store my tap for a week before a w/c.

So my tap water reading is 40PPM is not good enough for reef tank, right?
I've never used a R.O unit before. Hopefully the water come out of the R.O will be at 0 PPM. I also probably going to use it as my drinking water source.