I'm new here so please be patient!!
After months of research and scouring ebay I have now a fully working Intex AGP with 15" sand filter and .5hp pump. My problem might not be a problem... but that's were I need help (I've kept away from gallons as you guys in the US have different ones to the UK!!!)
The intex pool holds 18,000 litres of water
I measured the pump yesterday by filling a 44 litre bucket. It took 20 seconds!!
Bottom line is it cycles my pool in around 2.5 hours (7.92 cubic metres per hour).
This is all well and good until I read that my filter should only be able to handle 4-5 cubic metres an hour. My system cycles almost 8.
I'm using EGFM glass particles (10kg of 1-3mm and 25kg of .5 - 1mm)