StandbySetting
Fish Aficionado
A note on test kit, the majority of liquid hobby test kits are no more accurate than their liquid counter parts, the only exception that I have found to this so far are Saliferts.
Molly's should be fine in fresh water providing it is fairly hard, and nitrate is only really poses a problem at levels of 400PPM< so your 20PPM is really nothing to worry about.
Molly's should be fine in fresh water providing it is fairly hard, and nitrate is only really poses a problem at levels of 400PPM< so your 20PPM is really nothing to worry about.