Recent content by 606

It is a possibility too. Usualy i am stopping the aeration during the night but now i will continue with it, to see if there will be any changes. Anyway i have changed 1/3 of the water, and this morning only the black tetras were brething rapidly while angelfishes were breathing normaly.

Hi there, I have 250l aquarium with 2 pairs of angelfish, 10 black tetras, 6 coridoras, two pairs of colisa and one pleco. The aquarium is heavy planted. The system is aproximately 1 year old with same plants and same fish. Two weeks ago, one of the colisas died and after that within two...