When you were working with a CYA of 50 you should never let it drop below 3. It looks like you spent quite a bit of time at 3 and below. Most folks can get away with adding bleach every other day during summer, but not every 3-4 days. Riding the minimum means it only takes a little dip for algae to take hold. Try testing the pool every day for about 2 weeks once the slam is finished. That should give you a good idea how much chlorine you need on a daily basis, and you should be able to add every other day and still stay at the high end of the target level.Mid afternoon update: CL has dropped down to 18. So that is a 6 ppm loss from this morning. When SLAMing is this faster than usual CL loss expected? Lost .5 over night, lost 6 since this morning.
On a positive note the water quality is already notably improved. We have backed away from swampy green to a greenish blue now. The shallow end is now clear, the deep end still needs some work. Pump still running and I Just got back from the pool store with another 7.5 gallons of concentrated liquid.
Yup, ever since I started May of last year, I have it all logged in my spreadsheet. I could have just been running on borrowed time though. The cycle usually goes something like I check on a Sunday and bring it up to whatever my current target CL is, so since January 6th of this year that has been 7. I then check it again 4 or so days later. The CL at that point has dropped down to 2 or 3 and then I raise it back up.
That's a snapshot of part of my log. The CL numbers there are what it is when I take the reading and then I add liquid to bring it back up. What I am reading is that this may not be frequent enough, especially during the summer months?
Someone posted something about algae behind the light, I have never checked or cleaned there. I don't know how to take it off, is there something special you need to do so I don't get electrocuted or something? Power and water sounds like a bad combo.
Yes! That video was exactly what I was wondering about. Perfect, thanks. The pool light has been removed and is now sitting up on the deck for the remainder of this process. So something positive out of this whole experience is I now know how to remove the pool light. That was pretty easy. Now I want to replace it with some fancy color changing something or another.