What are the common sickness for Oscars? And what medications are the best for these? Also when my oscar is sick should i refrain from doing anything? e.g. hand feeding, what types of food i should feed etc. Thanks for ur help.

I'm not sure if there is an answer to common sicknesses in Oscars. When it comes to the health of your Oscars, a lot of it depends on how you look after it. Unfortunately, too many people keep Oscars in an unsuitable environment so I would probably say that hole in the head disease crops up more than any other ailment.

It really is quite simple, to do your best to keep your Oscar healthy, you need a large aquarium, in my opinion, no less than 75 gallons for one Oscar. You need extremely good filtration, preferably some kind of external canister filter. You can not only fit lots of biological media into these, they are also very efficient at removing waste which is very important. You need to feed your Oscar on healthy food and vary at if you can. And finally, you need to carry out regular tank maintenance. Some people feed vitamins to their fish, my personal opinion as this is not necessarily as all the nutrients needed can be found in live food, or frozen/freeze-dried food.

I'm sure that other people have lots more to add to this

All the problems i have had have been caused by 2 things

Nitrates too high because i used to overfeed and not do enough water changes. Best thing i ever did was buy a testing kit. It tells you if the water quality is good enough. I test once a month now. My friends oscars have developed 'hole in the head' and when we tested the water the nitrates were off the scale. He does 50% water changes every week but he used to feed his fish till they wouldnt eat anymore (overfeeding)

The other reason has been aggression from unsuitable tank mates. Sometimes oscars just dont get on. Also never listen to fish shop workers about the suitability of tank makes. Research yourself, dont buy on impulse. I have had been told green terrors and festae were both suitable tank mates, they were not and they battered my oscar and got returned

THANKS GUYS:)

there is one other common problem, white spot. fortunately its dead easy to cure. All fish shops sell cures for this