I posted my first thread here quite a few months ago, and I've made some mistakes, and am still learning.
That's the original thread. Since it was so many months ago, I started this new thread. Mods please let me know if you want me to close this one and just continue on from the old one-I know that has been policy in the past, I just figured since it was so long ago a new thread was in order.
long story short- I'm renting a house with a pool from the 60's/70's that hasn't been maintained at all. The pool guy sucked (1-2 tablets thrown in a week and a quick brush down does not = $130 a month in my book). I came here and threw the chlorine float in the garage and started on BBB, and shocked my pool.
Here's my original readings from March:
PH-7.5 (it was between 7.4 and 7.6)
I did a small drain/refill, cleaned the DE filter, and got the following readings:
That brought me to mid-april...I figured things were fine and I continued to test weekly instead of daily...then I got lazy...
I tested weekly for about a month and thought I had it all figured out. I figured I was doomed with high CYA since I wasn't going to empty/refill the pool anytime soon, and figured that I should add about 2-182 oz bottles of bleach every 3 days. Things were going well, or so I thought.
Some algae started creeping around...some green stuff. I bought a wire brush attachment and would go crazy on the pool for a day and then the next day vacuum all the debris up. I'd do that about once a week. I had to backwash/refill my DE filter once because the PSI changed more than 10 PSI since I cleaned it last (went from 18-30 with all the debris trapped in there).
Then about a month ago, the rain came...and came and came and came! Here in Houston, it was doing crazy downpours for a good two weeks. I would throw in a bottle, maybe 2 after the first storm or two, but when it rained for a week I got lazy and didn't want to waste money on bleach and shocking it Monday to just have to do it again on Tuesday.
Now the rain has stopped, and I'm pretty sure it's evident in the pictures in the other thread, but I think I've got black algae...ALL OVER THE POOL. It feels slimy if I haven't brushed in a bit, it scraped with a fingernail black and looks black/green on paper, and it keeps coming back. I haven't shocked the pool in a long time, but it looks like I'm due for some hard core maintenance this week.
I finally got back out the test kit today and did a full test:
FC-2.0 (way too low I know!)
What surprised the heck out of me is the CYA...it went from 70 back in April down to 35 now!? I'm trying to think of why...yes, we had a lot of rain. Question is, where does all the water go when it fills so high? The pool was never overfilling or anything, but the water is going somewhere!
Second thing is I gotta get that FC back up! 3-7 from what Pool school tells me, and get the PH down to maybe 7.4 so I can combat the algae better? CH seems a bit high, but has always been...I'm not too concerned about that, should I be?
Really liking this new CYA level if that's true...SO MUCH LESS BLEACH TO BUY! But, I gotta combat the black algae.
Looking for a plan of attack here...ideas?
So far I'm thinking:
1) Shock the pool, brushing every day, for probably a good week (Until the overnight tests is a success and the water is clear). Should I be brushing with the wire brush each time? If so, debris is going to build up on the bottom. Do I need to vacuum this every day or can it sit at the bottom until the weekend, vacuuming once/twice a week?
2) I'm thinking of using polyquat 60 in conjunction with this. Thoughts?
I know it's been said before in this forum to just keep going on the old thread, but that was 4 months old...if needs be, please let me know and I'll close this thread and attach this post to my old thread. Lessons have been learned to not get complacent with the testing...that's for sure. I need more regent to test my FC level for my taylor kit as I just ran out today.
Also, I informed the owners of the problems the pool is having, noting that some pieces of plaster actually chip off, revealing the concrete underneath it. They stated they do not plan on replastering the pool. Short of keeping the filter running, I don't expect anything from them.
Two pictures of the pool/algae
EDIT: Just re-tested CYA as I couldn't believe those numbers. My taylor FPD kit (2006 one) goes to 20 on the readings. At around 30 it gets very cloudy and I'm squinting to see the dot, but can barely make it out. At twenty I don't think I can see it. Looks like I might need to boost my CYA up?