Suitable for use in all swimming pool sand filters. As a general rule, use 50kg for filters up to 19" diameter and 75kg for larger sizes. Intex Sand Filter Pump Requirements; 56686 Intex Krystal Clear 1200 Gall/Hr Sand Filter Pump- 1 Bag 56674 Intex Krystal Clear 1600 Gall/Hr Sand Filter Pump- 1 Bag 56678 Intex 1600 Gall/Hr Krystal Clear Sand Filter Pump With Saltwater System- 1 Bag 56672 Intex Krystal Clear 2650 Gall/Hr Sand Filter Pump- 2 Bags 56682 Intex 2650 Gall/Hr Krystal Clear Sand Filter Pump With Saltwater System- 2 Bags Bestway Sand Filter Pump Requirements; 58257 Bestway 1000 Gallon Flowclear Sand Filter Pump- 1 Bag 58199 Bestway 1500 Gallon Flowclear Sand Filter Pump- 1 Bag.