Our pool is going on 6 years old. It is about 15000 gallons and we use a Sta-Rite System 3 cartridge filter. Last year we started having pressure issues so I replaced the cartridges which helped for the remainder of the summer. This year, it is worse than last year. I clean the filters with a high pressure nozzle on my garden hose and the pressure drops to a normal 17 psi. But within an hour, the pressure is up to 30 psi. I'm guessing I have some calcium issues going on so I think I will be draining the pool and starting fresh.

I have a question concerning filters though. I don't want to shell out $450+ for cartridges annually if this problem continues. I'm thinking about going to sand. Does anyone know if there is a conversion kit for my current housing? I've browsed the internet for an answer but can't seem to find one. It would be nice to keep the expense down by using the existing housing.


Thanks-