I have a 24 ft AG pool and recently had to replace my pump. Now, pumps are definitely not my department, but my friend and fellow mod is definitely knowledgeable in this area. In fact, I left it up to him to pick out the pump I should have for my pool and he chose a 1/2 hp inground pool pump for my AG pool. Couldn't tell you off hand what type it is or why he decided 1/2 hp was enough, but it does a good job. Vac works well. I previously had a 1hp pump which was overkill for my size pool. Maybe Al will pop in here and offer more info.