Hi All. Am a recent joiner and am very grateful to all the folks on this board. I purchased my home last year and inherited the results and advice from the prior owner who had been "pool stored". Only until recently, after using trichlor pucks and cal-hypo shock for a year, did I realize that I could no longer keep my pool in control after a recent algae outbreak.
The pool never turned green, but I would shock the pool and come back to find green/yellow walls as soon as chlorine returned to normal levels. I learned that my >100 CYA pool had to be drained and I had ended up draining half the pool (much to the chagrin of my wife, who wanted me to just "hire someone"...). I would've drained more but was fearful of hydrostatic pressure as there is a high water table around here and there are no hydrostatic valves on my pool (48k gunite).
I'm using chemgeek's chart, and have been maintaining appropriate chlorine levels since refilling the pool.
My tests are as follows:
The water was clearing up real nice (turned green when I drained pool because pump couldn't run), and since I couldn't yet see the bottom to vacuum, I've been using the brush and swirling the algae around hoping that it would get suspended and taken in via the pump/skimmers.
I came home this evening, and the pool was very clear, but the walls and floor were very green/yellow. I never could figure out if I had mustard algae the first time around,... but am concerned this time.
My tests are coming up fine. The CC although at 0.5 seems within acceptable limits. I've passed the OCLT (I think),... Did I come back this evening to the dead algae that's been there the whole time or is this new growth?
I don't necessarily want to dump 9 bottles of 12.5% chlorine if the algae I just vacuumed up for the past 1.5 hours (Don't have separate vac, so using hose to skimmer, into DE filter) was already dead....
so 2 questions:
1. Should dead algae be white or can it be yellow/green?
2. Shall I go ahead and SLAM the pool or am I ok?,... I just scrubbed and the pool looks clean, other than a few spots I couldn't get go with my brush.
BTW, have a pool party this coming Saturday so would like eradicate any problems before then (Monday now so have some time)
Thank you all!!!