Not long ago, I thought I had made a fatal fish mistake. My small tanks (< 30g) are filtered with HOBs, with the exception of one that is filtered with a small, external canister. And none of these tanks have back up air pumps for power outages. When I feed the HOB- filtered tanks, I typically turn off the filters, something I did as usual a few nights ago. I do this to prevent food from getting blown around and inevitably getting sucked into the filter intakes even though they’re prefiltered. At the time, I had three such tanks occupied. Two of those each contained a single adult Telmatochromis temporalis, and the third only contained a few juveniles. The two adult Telmats are actually my breeding pair. They’re segregated because they’re prolific breeders and, to be honest, I needed a break from caring for so many fry.