I just recently bought a used 225 saltwater gallon aquarium with 2 built in over flows. I don't plan on using this tank for saltwater, and i have removed the overflows box and now i have 4 of the predrilled holes in the bottom of the tank that was for the overflows. What can i do to plug up the holes? Suggestions or ideas welcome. I was thinking i should putty it up with silicon?
