I have a 10K gallon fiberglass pool. A couple of CH questions:
1) Is there a minimal level of CH for FIBERGLASS? In some of the stuff I've read, I read a minimum of 200 should be maintained so "pool equipment" is not damaged. I've never had an issue before, but just curious. I'm asking because I'd like to start using CalHypo once in awhile to get to shock level versus bleach.
2) I've had issues with the Taylor calcium test where the last reagent (R-0012) turns my pink solution clear (not blue). This happens with only 2 drops of R-0012 so I am assuming my current reading is 20. I read another post where it linked to the Taylor site and they suggest adding a few drops of R-0012 prior to second reagent. I did this, but then when adding the second reagent the liquid turned clear.
3) A few years back, I did add some Calcium. But, interestingly, when I added my usual dose of Metal Magic, I think it removed the Calcium from the water by filtering it. I remember I thought I wasted money on the Calcium! Since my pool requires about a quart of Metal Magic every 25 days (or else I get staining), seems like Calcium won't stay in the pool. Not that I'm worried because I've operated this pool for years using BBB without many issues. But, just wanted to see if this makes sense...