There has been no reprieve from the heat. I was at a LFS (local fish shop) just a moment ago and the fish health manager was putting in frozen bottles of water into the tanks in the upper tier. He remarked that the water temperature would be go as high as 35degC!
Temperature stratification is common in fish facilities. This explains the reason why discus fish (which require warmer temperatures than your average tropical fish) are often in the top tier at your LFS.
I advised him that he could make a few rearrangements so that the more heat tolerant fish are put in the top rungs. Increasing aeration and decreasing stocking density would also help. Lids may be left off tanks that do not hold jumpy fishes to allow for evaporative cooling.
Sound advice.thank you Dr Rich
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