squirrel49
06-29-2007, 10:33 PM
I ran out of the CYA Reagent for testing CYA levels, so I went to the pool store to have my water tested. They said I had less than 10ppm CYA, so I purchased 6 lbs of stabilizer, added it, and had the water re-tested 3 days later. This time, they said my CYA level was 0! I knew this to be incorrect since I had just added 6 lbs stabilizer. They then tested for phospates which measured off the charts at > 5000ppb. They told me that a high level of phosphates could mask the CYA readings. Is this true?
I added two quarts of SeaKlear Phosphate Remover, and had the water re-tested. The phosphate now read ~4000 ppb and the CYA still read 0. They told me that phosphates are usually due to fertilzer, etc... I found this hard to believe since I never get fertilizer near the pool and have not ever had this problem in the past.
I then think I found the source of my phosphates. Earlier in the season, while trying to correct what I thought was a staining problem, I added a sequestering agent (GLB SequaSol). It turns out that this sequestering agent is phosphate based. I am now convinced that this is the cause of my high phosphate level.
A few Questions:
1) Do I need to continue to try to lower the phosphate level from the 4000ppb it is at now?
2) Does a very high phosphate level such as mine mask the ability to accurately read or detect CYA levels?
3) If not, why can't they detect any CYA even after adding 6 lbs of stabilzer (Cyanuric Acid)
My other readings are as follows:
FC 2
CC 0
TC 2
PH 7.6
ALK 90
CAL 220
SALT 3400
CYA 0
I added two quarts of SeaKlear Phosphate Remover, and had the water re-tested. The phosphate now read ~4000 ppb and the CYA still read 0. They told me that phosphates are usually due to fertilzer, etc... I found this hard to believe since I never get fertilizer near the pool and have not ever had this problem in the past.
I then think I found the source of my phosphates. Earlier in the season, while trying to correct what I thought was a staining problem, I added a sequestering agent (GLB SequaSol). It turns out that this sequestering agent is phosphate based. I am now convinced that this is the cause of my high phosphate level.
A few Questions:
1) Do I need to continue to try to lower the phosphate level from the 4000ppb it is at now?
2) Does a very high phosphate level such as mine mask the ability to accurately read or detect CYA levels?
3) If not, why can't they detect any CYA even after adding 6 lbs of stabilzer (Cyanuric Acid)
My other readings are as follows:
FC 2
CC 0
TC 2
PH 7.6
ALK 90
CAL 220
SALT 3400
CYA 0