That is awful, yeah how hard are water changes? I have two large tanks with Oscars and they get weekly water changes. If your not committed to your fish, you shouldn't have any. Just my opinion.
LOL
when i first got into keeping fish i heard alot of crap like oscars are prone to hith. after being in the hobby for awhile you find out that lack of maintenance is the cause of alot of problems. it sucks that the fish have to suffer because of someones laziness.