Have been working on SLAM, last night out of bleach to add so FC was 13. This morning it was 11. We did have some rain overnight. Not sure how much. Can the rain cause loss of FC? Will try again tonight.
Added the recommended bleach to get back to 16. Went out for a few hours, came back and it was at 8. Added the recommended bleach. Just checked again and at 10. Added more bleach. That's 10 jugs of 121oz 6% this afternoon and 2 more this morning. A ton yesterday and the day before. Water is clear, CC = 0.
Any ideas why it's burning through so much chlorine?
Was going to put in a quarter to test and see if I can see what side at the bottom of the deep end, but I spent them all buying bleach. Ugh
I probably haven't been doing the SLAM long enough and didn't realize you needed to check every couple of hours. Trying to do that now. FC was just at 15 and added more. Have the robot running around the pool now. Will check one more time this evening and see hope for less loss tomorrow morning. Went from 15 to 13 last night to this morning.
No ladders or anything, but there are lights. Lot's of loose tiles too that will be replaced next spring.
One dead spot at the bottom of the steps where some light dirt gets caught
No good way to get behind the tiles that I can think of besides pulling them off which I don't want to do yet. Looks bad enough with the amount missing already. Just need to get through this season. Next spring, new tiles, coping, and plaster.
Try putting full strength chlorine in a syringe and squirting it behind the tiles wherever you can. I think I'd do this as much as possible. I have dealt with lose tiles before, taking them all off was the best decision ever. The grooves in the thinset/mastic are perfect for catching algae where you can't see it.
Shrug... I like bleach for most things, so it sounds not so horrible to me. Just letting you know that if you can't get atop the algae/chlorine loss even with following exact SLAM, that eliminating any hidden algae is what you're looking at to remedy it.
You won't be able to see the algae, but the ones where you can see the grout missing you can just squirt it at the top and sides and hope gravity will help it find it's way behind the tile as best it can.