yeah i have nothing but praise for the jungle brand parasite clear tabs, though getting enough to treat a tank that large is gonna cost a pretty penny, did you add any new fish without quarantining them first? if so then this is the reason to keep a small quarantine tank set up, that way you can observe any new fish first and if there is an issue its a lot cheaper treating a little 20g or something than it is a big display tank.... GOOD LUCK though, if its still eating you shouldn't have any problems just treat as soon as possible (also the jungle brand is very mild and not stressful on the fish like some other meds, i used that brand in a tank with tiny 1in> festae fry when i had to treat another fish i had added to quarantine and didnt see any ill effects from the meds