Hi Thanks for the prompt reply. First off, I did mean 0.25ppm Nitr[I]te. I’ll admit, we only allowed the new tank about a week and a half of cycling before getting the mollies. We figured three of them in a 30 gallon would help speed the cycling process (with daily partial water changes until it settled). As far as the salt goes, we have very slightly brackish water (about half the recommended treatment – so a tablespoon per 10 gallons) as we did intend for this to be a community tank.