Hello out there please can anyone give me some advice on my albino tiger oscar, he is three years old, he was in the same 4 foot tank for 3 years with no trouble then i had to move house and put him in a 2 foot holding tank and there he started sulking and not eating as much, there was also a nitrite spike, so i placed him back in his for foot tank that i had been cycling out side, when i put him in this tank he just sat on the bottom and would not swim or eat, so i placed extra aquarium salt some epsom salts and some promethasul multicure,it didnt seem to help and in the next couple of days he started floating on the top of the tank, i took him to my local vet who had no idea but still prescribed metronidazole for a swim bladder problem, he did not no the dose rate so i found all this info myself and changed himto a 10 litre tank and started a 14 day treatment last monday arrvo, but it has started a really bad ammonia spike at 5.0 i have tried everything i know to lower it bottled bact, extra salt(aquarium and epsom),and ammonia removal rocks, but it is still at 4.0 and i am afraid that he will die from ammonia poisoning before i finsih treatmnet. IS THERE ANYONE OUT THERE THAT CAN GIVE SOME POSITIVE ADVICE OR ANYONE THAT HAS HAD A FLOATING OSCAR AND HAS TREATED THEM SUCCESSFULLY PLS LET ME NO