Long time lurker, new registration, and first post greeting!
I am a home renter responsible for the IG pool in the back, but luckily the owner has been kind enough to replace the hardware when it goes bad, as occurred a month ago when the multiport valve sprung a leak. That leak forced me to shut down the pool for a while and I got a nasty algae bloom. The filter was replaced entirely and the pool was shocked to **** and back and things were good for a couple of weeks. I let my chlorine level drop too low (I was unaware that my skimmer pucks were introducing CYA into my water - newb mistake) right as the weather peaked causing another algae bloom that I'm fighting back again.
I vacuumed all the algae to waste and began treatment. Having spent my pool store chemicals already, I've adopted BBB and have been shocking the pool with 6% Clorox up to about 18ppm and brush the liner 3 times a day (morning, after work, and before bed). The pool's not green anymore, at least not noticeably so. It's a familiar hazy grayish blue now.
The environment: my pool is shaded about 3/4 by a large oak in the back. Lots of other trees in the neighborhood and I frequently clean the skimmer basket and manually skim the surface. I've shocked the pool from ~4ppm to 12ppm on day 1, then up again to 18ppm for days 2 and 3, and last night I didn't "need" to add bleach since the 18ppm reading stayed constant from the morning but I did anyway. I don't have a FAS/DPD test so I've been using a sophisticated version of the "shotglass method" (meaning I use a graduated cylinder to dilute the pool water and multiply my readings accordingly) - it's not the most accurate but it'll have to do until I can afford to order a FAS/DPD addition to my Leslie DPD kit. I recently moved to Maryland from Georgia and the weather seems too cool for a pool - water temp threatens to hit 80F and I've been in the pool once this season for leisure, three other times to "stimulate the blood."
My question is this: is it normal at this point for me to still get faint green clouds from brushing the liner?