Posted by kg on July 21, 2002 at 00:52:58:
In Reply to: HELP with Filtration for a 20 gallon hex posted by Eve on May 09, 2002 at 08:00:03:
A 150 would be fine alone, BUT you cannot keep discus alone or in that small of a tank. Get a 40 plus gallon tank and get him some buddies, along with dither fish to make him feel more comfortable.
Maybe you should do some more research too.