F fish dork AC Members Jun 17, 2009 17 0 0 48 BC, Canada Aug 7, 2009 #11 I use DAP plaster of paris. It's mostly CaSO4. Add at night as it will take a few hours for the water to clear up.
I use DAP plaster of paris. It's mostly CaSO4. Add at night as it will take a few hours for the water to clear up.
