New member but have been reading with great interest the various member trials of the CYA reducer. In late April, I tested my pool water and discovered my CYA was once again on the high side with a reading of 100 ppm. I've been using Trichlor pucks and performed a complete drain and acid wash last summer due to a persistent black algae problem and high CH and CYA levels. One mistake was not switching off the Trichlor and going with bleach only to maintain my FC levels.
Lesson learned, I'm now off the pucks and using bleach only but needed to get my CYA level down help manage ongoing chlorine cost so I cross my fingers and invested in a bag of Bio Active.
After reading some mixed results members, I decided to start with a really low FC level and let if drift to 0 during my test with pump running 8 hrs a day.
Starting measurements:
Day 1 (6/2/15)
Added 1 bag of Bio Active at 10 am
FC = 1.0
CH = 240
CYA = 110
TA = 80
PH = 7.6
Water temp = 83.4 (clear skies)
water clear, light visible algae in pool
Day 2 (6/3/15)
FC = 0.0
CH = 240
CYA = (did not test)
TA = 80
PH = 7.6
Water temp = 84.0 (clear skies)
Water beginning to turn cloudy, increased algae in pool
Day 3 (6/4/15)
FC = 0.0
CH = 240
CYA = (did not test)
TA = 85
PH = 7.7 (reduced back to 7.5 with acid)
Water temp = 84.8 (clear skies)
Water turning murky, increased algae in pool
Day 4 (6/5/15)
FC = 0.0
CH = 240
CYA = 35 (tested at 7 pm)
TA = 85
PH = 7.5
Water temp = 85.6 (clear skies)
Water very murky, increased algae in pool
SLAMED pool to stop Bio Active.
6/9/15 update:
Been keeping FC level around 4 ppm with bleach. With additional tests, CYA level has been holding steady around 35/40 ppm. Water is crystal clear, no signs of algae after the SLAM.
I experienced great results, not sure if it was due to CYA levels not being off the charts yet or running my chlorine levels at 0 for several days. Regardless, I'm thrilled to have my CYA back down and, if needed, would definitely use this product again.
Lesson learned, I'm now off the pucks and using bleach only but needed to get my CYA level down help manage ongoing chlorine cost so I cross my fingers and invested in a bag of Bio Active.
After reading some mixed results members, I decided to start with a really low FC level and let if drift to 0 during my test with pump running 8 hrs a day.
Starting measurements:
Day 1 (6/2/15)
Added 1 bag of Bio Active at 10 am
FC = 1.0
CH = 240
CYA = 110
TA = 80
PH = 7.6
Water temp = 83.4 (clear skies)
water clear, light visible algae in pool
Day 2 (6/3/15)
FC = 0.0
CH = 240
CYA = (did not test)
TA = 80
PH = 7.6
Water temp = 84.0 (clear skies)
Water beginning to turn cloudy, increased algae in pool
Day 3 (6/4/15)
FC = 0.0
CH = 240
CYA = (did not test)
TA = 85
PH = 7.7 (reduced back to 7.5 with acid)
Water temp = 84.8 (clear skies)
Water turning murky, increased algae in pool
Day 4 (6/5/15)
FC = 0.0
CH = 240
CYA = 35 (tested at 7 pm)
TA = 85
PH = 7.5
Water temp = 85.6 (clear skies)
Water very murky, increased algae in pool
SLAMED pool to stop Bio Active.
6/9/15 update:
Been keeping FC level around 4 ppm with bleach. With additional tests, CYA level has been holding steady around 35/40 ppm. Water is crystal clear, no signs of algae after the SLAM.
I experienced great results, not sure if it was due to CYA levels not being off the charts yet or running my chlorine levels at 0 for several days. Regardless, I'm thrilled to have my CYA back down and, if needed, would definitely use this product again.