Great water pressure without cartridge, none with cartridge

[dschddny]

When I run my Hayward cartridge filter without the cartridge (either when I'm vacuuming or just as a test), the jets shoot out water VERY STRONG, water current flies around the pool. Then when I put the cartridge back in the filter, the water comes out of the jets as a small trickle! Any ideas? I'm sure I'm using the proper cartridge, proper size, and I make sure to clean the cartridge very thoroughly.

Thanks!!!!!

[Teapot]

Cartridges clog by around 10% even after they are cleaned, so eventually become useless.

[dschddny]

Cartridges clog by around 10% even after they are cleaned, so eventually become useless.

So what's the solution then, get a new cartridge after it gets clogged? The pool was super dirty as we hadn't opened it for a few years, so definitely a lot of junk has gone through the cartridge after using it for several days...

[Teapot]

Yes that could well be what's needed.
Do you use multi action chlorine tabs? If so, some contain flocculant and clarifiers both of which can be bad for cartridge filters.

[dschddny]

Yes that could well be what's needed.
Do you use multi action chlorine tabs? If so, some contain flocculant and clarifiers both of which can be bad for cartridge filters.

I do use chlorine tabs, don't know if they are "multi action". "bad for cartridge filters" meaning killing the cartridge rather quickly after just a week of use?

And btw, thanks!!!

[Teapot]

The thing about the pool industry is it won't tell you a product is bad for this or that as it prides itself on more sales.
The tabs usually brag about how many things they do like anti algae, flocculant and clarifiers.