I have an above ground Intex 18x52 pool and I keep getting algae. I have spent way too much in chemicals (we live in Southern California and the heat is causing some of the algae problems). Considering replacement filter system. Any suggestions for size of pump, brand, etc? I found a Hayward 1.5 hp filter system, but sales rep says hoses may not be same size and would have to purchase adapters for connectors. Any other ideas aside from replacing filter system?