OK,

I seem to have an issue with my filter cartridges.

I have to clean them very often or my pressure through the pump is horrible and the pump basket develops a huge air pocket.

My pool seems to suffer from this lack of good flow as well.

I use SoftSwim, the pool had biguanide when we moved in, so being new to the pool, I kept it as is.

I don't know how old the cartridges are, but it would seem that the 2 I need will run approx $100. Will that fix things? As filters get old do they restrict flow?

The other solution is to switch to a sand filter. I assume it would have to sit in front of the pump on the intake side, but I'm new at this.

Please sound off, new cartridges or switch to sand filter?