I have a 30 gallon hex aquarium started in September. The water parameters all test OK : Ammonia -0, nitrites - 0 , nitrates -5-10, Ph-8.0, temperature about 75. I do water changes regularily but have not done one since 12/22 due to being away.
I had 2 ottos, 2 small clown loaches, 3 angels and...