This was the first time since I've started the BBB method that we have left to go out of town for several days.
Prior to leaving, I prepared by adding enough liquid chlorine so that when we came home this morning my chlorine would hopefully be at target. I loose about 1ppm typically.
While we were gone (3 days) we had some pretty heavy thunderstorms that we knew had dumped a bunch of water into the pool, so I was expecting a bit of a mess, however I was pleasantly surprised...I THINK, but a little unsure of a couple of things.
A bit of history...we've always had a high CH and I've been managing it by keeping the CSI slightly negative to prevent scaling until we could do a partial drain/fill in the fall.
Friday morning before we left (and after I bumped up my chemicals) my test results were:
FC - 11 (intentionally raised it for our absence)
CC - 0.5
pH - 7.0 (intentionally dropped it down from 7.3 since we would be gone and we have a lot of aeration so it goes up .2 -.3 overnight)
TA - 70
CYA - 60
CH - 520ish (the norm for us)
Temp - 86 (we fluctuate between this and about 90 due to our very hot summers)
When we got home this morning at 1:00am(yep...2 1/2 hrs ago), the pool water appeared crystal clear, however there was quite a bit of tree debris and leaves, etc on the floor due to the storms. My cleaner cannot be left in the pool, so the floors were not being cleaned while we were gone.
I was elated over the crystal clear water, so I did a little bragging to the DH (who also commented on how great the water still looked) , went and grabbed my fancy little TF-100 and speedstir and got after it.
FC - 8
CC - 0.5
TC - 8.5
pH - 7.3ish
TA - 40!!!!!!
CYA - 55
CH - 400!!!!!!!
Temp - 79....CRAZY low for us at this time of year, so things cooled down with those storms for sure.
I mean, I knew it had stormed pretty bad, but WOW....almost enough to "fix" my CH problem and totally jack with my TA level that much???
So....I backwashed, cleaned all the skimmers and filter baskets and threw the ole Dolphin into the pool to start cleaning up the floors and walls and went ahead and started the process of adding baking soda a bit at a time to bring the TA back up to my target.
Anyway, while the water "looked" very pretty and crystal to clear and no visible signs of any algae etc.....once flipper started doing her thing I started noticing tons of tiny little particles floating under the water only visible in front of the underwater lighting when the water was stirred up....but a LOT of little particles....enough to make you think to yourself, "no way in the world would I ever even think about getting into that water".
This all being said though.....should I BE in a shocking process because of those particles? I was completely happy with the test results other than the way low TA, so I didn't think I needed to...but if I don't, does that mean whatever these tiniest of little particles are, will not go away and WHAT are they exactly? I was thinking maybe some biological things brought in with the rain, but clearly not enough to do too much damage to my chlorine loss, CC's, or water clarity.
Also, now that my CH has dropped to 400, do I really need to keep maintaining a slight negative CSI to prevent scaling? I realize 350 is preferable, but I almost fell out of my chair seeing that it had dropped 120 ppm just from the rain....that's a lot of dilution considering the pool calculator was telling me I needed to drain 67% of my water volume to get it to 350 for the past 2 months. Can this be an error??
Many thanks for any replies or comments.