we have 140l tank, but about 110l water in, external canister Filter, change 25% water once or twice a week, planted tank, co2 system stopped for 4 weeks now, 7 rummy nose, 2 small discus, 2 small clown loaches, 1 golden ram, 1 tiny clown loach, 1 6cm golden bristlenose pleco and now 8 cardinals tetra, was 13.
we had 3 cardinals tetra died so far, included the pop eye guy, but he had that 1 pop eye for 3 weeks.
1 more cardinals tetra is dying as according to the description of the Neon Tetra Disease disease, losing colour, bent body, swimming oddly, I have been putting tonic, it kinda help him survive, despite that it should be flush down the toliet by now, but does not looking any better.
:roll: