Hi I have a arowana and every week he gets this white stringy thing on him, he curls up and stops eating. He starts eating aggressively again as soon as I do a water change.I think it's because of water quality.Also he is in a fairly small tank(60 gallons).I just need him to hold for 5 more months as I'm building a 900gallon outdoor aquarium for him. Do you think this will solve the problem. Also can you tell me whether fungal medication will work for now.Ph was5.5 now it's 6.5 after water Change. Also I did use antibiotics in this tank, I think it killed all my bacteria