sta rite system 3 cardtidge as good as de?

[waterbear]

i was at my local abc pool supply and they were trying to sell me a sys3 cartridge instead of a de saying that these particular cartidges rivaled DE as far as particulate size goes, but i haven't seen anything on the sta rite website stating this or even eluding to the micron rating. has anyone heard anything like this about these filters? i was looking at the 300 square foot one.

my old spin de has worked well but it's so old i can't even find parts for it anymore...

The system 3 is available as a cartidge, DE, cartridge/DE combination, and as a sand filter. Which one was he trying to sell you? Both the cartridge and the cartridge/DE units look very much alike. If he was talking about the cartridge/DE combo then it will filter as well as a DE since it is. All the filters in the line are called 'Modular Media' filters since they can be converted from one type to another by replacing the internals.