Heat and starving fish
Strange things have happened in my 30 Litres / 8 Gallon fish tank, resulting in the loss of 2 celestichtys margeritatus.
Problems started with the hot and dry weather, that has not changed since the beginning of June. Temperatures rose over 30 C /90 F. My fish tank was invaded by probably blue-green algae, that stopped, after i put a bag over the fish tank when I left 5 days ago. when I returend, I found, that two of my fish had notches, where their bellies had been. I fed them two or three times and installed my self-built coČ-set for 2 hours.
I bought some living daphia, when i set them into my fish tank, i saw all of my 6 fish swimming. One hour later, I found one of the nearly starved fish dead, although he had been eating. On fish is missing, I could not find him.
I am now looking for the causes of this sudden deaths. Is it possible, that my fish died after i fed them? Is it possible, that too much coČ got into the tank? Could the heat be a reason?