Hello anyone can help me to know how I can deal with this issue my arowana all of a sudden started to open and close it’s mouth rapidly and stopped eating it’s totally ignoring the food even though I have a flowerhorn and an Oscar fish with it and they are eating normally lately I had a break in my sump glass and needed to be fixed and had a heater leaking electricity is that might be the issue but again all my other fishes are eating normally and my arowana is swimming normally only issue is the breathing and the fasting issue thx in adv for the help