Join Date: Jul 2010
Location: Outside Philadelphia, PA
If money were no object, I'd say sell the tank and replace it with a tank without a built in overflow.
Since that's not likely to be a solution, and you want to use a canister filter on the tank, I'd put plugs in the plumbing, and put some substrata in the overflow and try growing tall plants that can grow over the top of the overflow. Removing the overflow could be done, but you might want to use it in the future. Using a sump will allow a much cleaner looking tank, since it will not have all the tubes and such running around.