Any suggestions for replacing a 780gph summer escapes pool pump/filter. There are so many pumps I dont know what to choose. Pool is 16x42. I dont mind cartrige filters, that is what this one is, the added expense is just having to buy new filters every now and then. What is the added expense with a sand filter? Also wondering about hose fittings etc, how do I figure out what to get????? We had an algae bloom after I had a baby about two weeks ago, have been filtering cloudy water about a week now and seem to be getting nowhere. Strange thing is the return flow is pretty weak but the filter is clean as a whistle, I have checked all hoses etc, even the rotor for blockages and cant find anything wrong. We are going out of town for 4 days this week, pretty sure it will be a swamp when I get back. I want to replace the pump then and see if I can get back my sparkling oasis.