CWO4GUNNER
USN/USCG 1974-2004 Weps
I was speculating about the pearls ("I was thinking that the pearls are nothing more then resin"). I admit I did not read the details because it seems impossible to have a powerful enough back flush from a small HOB pump. However I suppose you could archive the same results by back flushing any filter by using an external pump on a canister out flow port and running the inflow port to drain. Theoretically a significant amount of the dirt would be back flushed but not enough to satisfy me.
Most water filtration back flush systems require high pressures of 130-250 PSI to be truly effective.
Most water filtration back flush systems require high pressures of 130-250 PSI to be truly effective.