Hello all!!
I have a 150 liter tank with a few 5 corys, 2 platties, 3 tetras. I recently lost my betta and another platty. The tank has been established 2 years.
Tested with APi master test kit and found the following.
PH 7.6 ish, tap water is the same.
Nitrites 0
ammonia 0
nitrates 160+
I...