I have an acrylic tank Iím setting up. Iím new to this, so want to make sure what Iím considering will work. Iím installing an internal overflow thatís 6Ē wide by 5Ē tall. Iím looking at installing a 1Ē bulkhead as the primary overflow, and a 3/4Ē bulkhead that will be higher as an emergency overflow. Any thoughts? Will two bulkheads in that limited space/that close to each other be a problem structurally?