I have a 180 gallon Oceanic Tank with dual over flow in each corner . How do i remove one with out it removing the caulking on the bottom? the sides are easy and i think it will be fine to do it but were the over flows meets the bottom on the side and back it looks like the caulking was put down right up to the overflow. So if I remove the over flow will it break the caulking? Is there a way to do this easy? I would just leave the bulkheads in and hopefully be fine. I want to remove one becaue I want the space and i only use one anyways.