Correct dosage of Melafix for my 3 gallon tank. Safe for plants? Should I do my Bettas treatment in a seperate tub?

[ItzAllyCat]

Are you sure you don't have the nitrite and nitrate reversed? A level of 20 PPM on nitrites is fatal.

****! Yeah I had that reversed, sorry their spelling is so similar.

 

[jaylach]

****! Yeah I had that reversed, sorry their spelling is so similar.

No problem. I just wanted myself and others to be certain.

Not certain if you gave an ammonia level but I don't think that you did. With nitrites at zero and nitrates at 20 I would assume that ammonia is also at zero but this is not always true. We need the ammonia level.

As to nitrates your level is normally OK but borderline. You may want to do larger water changes or more often. While 20 is not normally an issue your fish may be healthier if you can get that down to ~10 PPM... this depends a lot on the fish you keep.