I have to agree with all of the above - the tank's too small.
Combine that with decor (granite rock etc) that is big enough to hurt but small enough to move...
How often are you changing water ?
The other big trick with Oscars and plecos is frequent partial water changes - I like about 1/3 to 1/2 of the tank every 10-14 days.
In a tank that small I'd be leaning towards every 7 days...
I have an adult oscar in a 125g tank (with tankmates, but all much smaller and less messy than he is) and if I don't change his water on a weekly basis he gets stressed.
Minimum I would suggest as a "forever home" for a single oscar would be a 75g. If you want tankmates I'd go with something with a 6ft x 18" footprint (125g, 150g, etc) or larger.
Even a 55g or 65g "breeder" tank would be an improvement from the 30g, but you'd eventually need to upgrade to the 75g - and if the oscar is decent sized (ie 9-10" or longer) the 55g really isn't an option, its too narrow.
|