Gregcoyote
Aquarium Advice Addict
Sounds like you have to much water flow through reactor if its grinding up
I had it dialed down so you just saw a few particles bouncing on top. Much slower and it would have been shut off. The problem was it started to bind together within a few days from reacting to calcium. Then no amount of pressure would budge it.
It was the phosguard that ground up. But the GFO is messy for sure.