Added DE to Sand Filter, 1 cup didn't raise PSi

[nicole12]

I have a 1.5hp one speed pump and from what I've been reading on this forum is way too much for my 7500 gallon pool. Also on the pump I can't see how many GPM's it's turning out. The filter says 35max GPM's. Not on the pump not in the manual either.

[Poconos]

1.5 HP pump on a 150# filter is way oversized. All bets are off in this situation with the DE. You could very well be blowing stuff right thru the filter. As I said before, look at the return jets and see if the stuff is blowing thru. Best I can suggest for now.
Al

[waterbear]

reality check on zeolite. the grains do have small pores in them that can theoretically filter down to a few microns but water is going to take the path of least reisitance which will be BETWEEN the grains of zeolite, not through them...just like with sand! You might get marginally better filtraton but, IMHO, this is just a new 'snake oil' being peddled to unsuspecting pool owners!

[medvampire]

I have pondered zeolite just for ammonia removal but also thinking about salting my pool. From my understanding it uses salt for the ion exchange and you have to rebalance the equation every year by soaking the zeolite in a brine solution. If I were to use zeolite in a salted pool would it loose the ability to do the ion exchange killing the ammonia removal?
I did add DE to my filter about ¾ cup and got a 4 to 5 lb increase in psi. It gave me very good results. I no longer see as many particles in front of my pool light and the water sparkles in the sun.
Thanks
Steve