Added 2 quarts of muriatic acid and 2 quarts of chlorine to the pool tonight (at separate times, thanks to the Pool School for teaching me the proper handling). Pool math said we should add 8 lbs of CYA and we only had 5 on hand so we dissolved 2.5 lbs tonight and added it to the water near the deep end. I'll add the other 2.5 in the morning. With the skimmers off and restricted pool flow right now I didn't want to do the sock in the skimmer thing. We will do that when the skimmers are running.
So, here's something interesting...I've read the Pool Chemistry forums several times prior to today so I thought I knew how volatile Muriatic Acid was. I wore eye protection, gloves, held the bottle well away from me, etc. What I didn't realize is that because I live in a really humid area, the acid can actually react with the humid air and create a cloud of noxious vapor. I didn't have a mask that would protect me properly from that so I would measure, back off and breathe, repeat, then go to the pool to pour. The instructions say it should take over a minute to pour but that didn't work when it was turning to vapor so I just dumped it, waited a couple of minutes then brushed that area really well.
We'll be going through a lot of acid since this is new plaster so I'm going to have to figure out a better way to handle this. In the past I would have gotten one of those M95 mask things but with the pandemic they are hard to find and I'd feel wrong to get one anyway when other people need them. I've been searching TFP through the google search tool but haven't hit on any suggestions. If any of you know of any good threads for dealing with muriatic acid when living in a super humid area, I'd appreciate a link to it.
Have a good night!