I have come to understand that the reason Intex's cartridge pump+filter combos do such a poor job is because the pump, is mismatched to the cartridge size & filtering capacity of it's media.
Basically too much water flows through the cartridge, too fast, thus it can't catch everything.
Also, users have reported the cartridges themselves being of poor quality. My cartridge is an Intex original, shipped /w the pool. It seems quite durable as I'm able to wash it out regularly and it's pretty tough. However, I suspect that it's not getting all it could out of the water flow. It mostly filters in the bottom center of the pleat folds and very little on the rest of the pleats. I'm sure this is mostly due to the high water flow.
I believe that some users have ended up /w inferior cartridge brands that were even worse than what shipped originally with the pool. The ones in the stores seem to use an end cap design that isn't rubbery like this one, thus they won't seal as well, also the filter media appears to be thinner and lighter.
So I don't really think it's too horrible, other than being a measly 5sqft of filter media, no options available for more filtration area with my "A" type cartridge, as their is with the B type.
So until such time as I can afford a sand filter, I'll have to make do. I stumbled across a poster that stated they had blocked up a bit of the inlet hose going from the pool water, into the pump to be filtered, thus reducing the water flow & allowing the cartridge to filter better.
But I can't find that post again.
Does anyone know about this trick? Does it work? It won't burn up the pump will it, reducing it's flow like that?
Any help would be appreciated. Thx.