I am planning on doing this treatment sometime before Xmas, my only concern is the very high phospate level due to the use of Jack's Purple Stuff.
I was also planning on adding 16oz of Algaecide 60, the day before as added insurance, but bring the Chlorine back to 3 ppm on that day.
I will put the AA in the pool after dark, about 7 pm and adding back Chlorine as need prior to sunrise at about 5:30 am the next morning
With phosphates levels being in all probabilty way in excess of 30,000 ppb will I get an algae bloom or excessive ammonia build-up and have to use large amounts of chlorine to combat the effect of the very high phospate levels? Or would it just be better to drain once treated? In other words the cost of treating the pool with Algaecide 60 - $34 in Hawaii per 32 oz and large amounts of chlorine and time spent treating to compensate might work out the same as a drain.
For information: Water temps are around 68F and the pool stays in the shade till noon.
Thank you to those of you that might help.