I have been using Zelbrite in my pool for a year and have had to vacuum it weekly, because of a very fine dust that appears on the bottom. I have had enough of it now, I have been backwashing and cleaning non stop. The pool water is very clear, but this dust which must come from the Zelbrite ( If I leave the pump off, or put it on recirc, it does not appear). I spoke with the manufacturer (I am in Perth Australia) and they told me to backwash. It has had thousands of litres though it over the past 12 months, and still it reappears. I vacuum, then backwash. Next day it is back. Never any of the zelbrite itself (eg the "grains") just a very fine dust. Surely it should have blown everything into the pool by now, or is it breaking down to dust?
Chemically, everything is fine - can't find the pool test results but all was ok. Water is crystal clear.
I am thinking of taking the Zelbrite out and disposing of it, and replacing with sand - or can anybody offer any advice to fix this?
Pool 40,000 Litre Saltwater
2 HP pump (1.4KW)
24" Sand Filter