I am still up in the air about this and I dont know which way I want to go. I have my 38 gallon in the living room, not drilled and no sump. I want to add a sump (the solution to pollution is dilution) but I dont know if I want to go with a HOB overflow or just buy another 38 gallon and drill it myself, as I have the correct size glass bit to do it. I am just un-easy about having to relocate all my water/livestock to a temp container then put everything back into the new display tank...Does anyone have any suggestions on what order to do things.