Every month I lose a Corydoras sodalis, pH is okay, nitrate and ammonia are zero, filter is a Sunsun HW 402b, there's a mini fountain motor to help with water movement, there are 10 black neon tetras, 10 Mato Grosso tetras, 4 Corydoras sodalis, 1 tiger pleco and 1 pearl guppy.
u/FalcaoSan — 9 days ago