I have been toying with the idea of using pool filters in my sump as a prefilter before my biomedia as shown in the diagram. I have 2 inlets so there will be 2 pool filters. I added a refugium so that I could grow out some fish and perhaps later have this planted. Would this set up work? I will be using a 45 gallon tank as a sump for my 125. I was planning on using a sump pump with a float switch that I have had laying around for a couple of years. The max output on the pump I think is 900 gph. With a 5 foot lift would this size pump work?