Doing a little planning on the upcoming sump for the 100g. We have this 25g sump and wondering if it is going to be big enough? We have never had a sump before. Would guess the skimmer will go on the right side? Then if we put the return pump in the left side, we don't have much room for anything else. There looks to be a couple of support cleats on the left compartment and a tray will drilled holes that I have no idea what to do with.