this is how i designed the sump for my 50g and will most likely do it again but on a larger scale for my upgrade of my 90g.. where the water comes in a have a chamber for filter floss to reduce the amount of crud before skimmer. then skimmer then return area. my goal was to have as large of a return area as possible so i dont have to top up as often since auto top off is not an option on either tank the only change will be adding a carbon section. i can go 3 days tho without adding water.
