My pool is recently installed (plaster completed on May 3, 2012). I have been using Tri-Chlor pucks all season and have seen a recent uptick in CYA due to the heatwave here in the northeast. My CYA average so far this season has been 40 - 50, but last two readings are 90, hence my desire to change to a unstabilized chlorine alternative. My current readings are as follows:
FC - 3.0
CC - 0
pH - 7.6
TA - 100
CH - 250
CYA - 90
I have a few questions regarding the use of Cal-Hypo in a colored plaster pool that is running a DE filter.
(1) Can Cal-Hypo stain an Onyx Ansylbrite (colored) plaster pool irrespective of CH level?
(2) If Cal-Hypo is thoroghly mixed in a 5 gallon bucket of water before adding to pool (and sediment at bottom of bucket is not dumped in), is there any potential for staining or any other problems/issues with using Cal-Hypo in an Onyx Ansylbrite (colored) plaster pool if the CH is 250?
(3) Can using Cal-Hypo long-term cause any damage to a DE filter?