Moderator comment: This post was separated out from this thread: Aqualoon Filter Balls
Unfortunately my experience has been very bad with this product or rather with an identical product sold by Steinbach in Europe.
When used in my filter they worked prior to the first backwash, then at the backwash I noticed very little dirt coming out of them and also not a lot of water coming out and when I returned the system to filter the pressure in the filter much higher. I opened the filter to check and found that a load of the filter balls has been jammed into the multi-port head of the filter, so tight I had to use pliers to remove them. Checking the filter body there was also actual damage to the internal divider in the filter which stopped the filter head from going back on resulting in an unusable 500€ filter.
Steinbach refused to accept responsibility saying my pool must have been "too dirty" to use their filter balls and that the dirt was what caused the over-pressure not their balls even though sand had not had a problem with even dirtier water just two weeks prior when I first started cleaning the pool. Yes the pool was not "sparkling clean" but certainly not so dirty (I had let me kids take a first swim in it only few days earlier).
Here is a photo of the damage. It looks to me like the pressure popped the head up allowing the internal divider channel to compress at a weak point maybe and then when the pump was turned off the head was forced back down onto the internal divider edge snapping it. But hey that is all just conjecture I don't really know, all I know if it wasn't there before I put the balls in the filter.

regards
Sam
Unfortunately my experience has been very bad with this product or rather with an identical product sold by Steinbach in Europe.
When used in my filter they worked prior to the first backwash, then at the backwash I noticed very little dirt coming out of them and also not a lot of water coming out and when I returned the system to filter the pressure in the filter much higher. I opened the filter to check and found that a load of the filter balls has been jammed into the multi-port head of the filter, so tight I had to use pliers to remove them. Checking the filter body there was also actual damage to the internal divider in the filter which stopped the filter head from going back on resulting in an unusable 500€ filter.
Steinbach refused to accept responsibility saying my pool must have been "too dirty" to use their filter balls and that the dirt was what caused the over-pressure not their balls even though sand had not had a problem with even dirtier water just two weeks prior when I first started cleaning the pool. Yes the pool was not "sparkling clean" but certainly not so dirty (I had let me kids take a first swim in it only few days earlier).
Here is a photo of the damage. It looks to me like the pressure popped the head up allowing the internal divider channel to compress at a weak point maybe and then when the pump was turned off the head was forced back down onto the internal divider edge snapping it. But hey that is all just conjecture I don't really know, all I know if it wasn't there before I put the balls in the filter.

regards
Sam