Hi, new to this forum but was concerned about one of my emperor tetras. I have a recently cycled 250 litre (60ish gallon) tank, with 3 emperor tetras (I know that 3 is not an ideal number), 3 Buenos Aires tetras, 4 dwarf gourami, 6 neon tetras and 1 Chinese algae eater.
With a PH of 6.6...