It looks like I have found a 125 gallon tank with dual corner overflows. Problem is, I have never used a drilled tank, sump, wet dry etc.. I have only used sponge filters and HOB filters. If I choose to stick with the HOBs and Sponge filters, can I just plug the bulkheads and go? Will water sit in the overflows and cause water chemistry problems? Can the overflows be safely removed? It seems there is mixed opinions on this.
