First time post, long time reader here.
I have a 16'x32' vinyl inground pool with a Hayward Superpump and 300 lb sand filter in Connecticut. I'm estimating it to be about 18,000 gallons. I use a TF-100 test kit. The pool has been cloudy green for a few weeks. I have been running the pump 24/7 and it's not getting any clearer. Here are my numbers from last night:
FC 35 (I went a little overboard with the last addition of chlorine out of frustration. I know my shock level is 20 based on the CYA.)
CC 0
PH 7.5
TA 140
CYA 50
I checked the chlorine again this morning and it was still 35 so it passed the overnight test.
I took a water sample to the pool store to see if their results were close to mine. They said my chemicals were balanced except TA and CH. They measured my TA at only 100 and should be increased to 125-150. Also, my calcium hardness was really low and I needed to add 19 lbs of their product. I thought that wasn't necessary for vinyl pools so I didn't buy it.
About a month ago, I cleaned out my sand filter for the first time since I moved into the house (5 years ago). The laterals looked fine. I then replaced the 300 lbs of sand with 150 lbs of Zeosand. I followed the instructions on the bag - long backwash and rinse before filtering, which I did twice. Could the Zeosand be causing the pool to be green?
Here's a pic of the situation:
Thanks for all your help!
Zack
I have a 16'x32' vinyl inground pool with a Hayward Superpump and 300 lb sand filter in Connecticut. I'm estimating it to be about 18,000 gallons. I use a TF-100 test kit. The pool has been cloudy green for a few weeks. I have been running the pump 24/7 and it's not getting any clearer. Here are my numbers from last night:
FC 35 (I went a little overboard with the last addition of chlorine out of frustration. I know my shock level is 20 based on the CYA.)
CC 0
PH 7.5
TA 140
CYA 50
I checked the chlorine again this morning and it was still 35 so it passed the overnight test.
I took a water sample to the pool store to see if their results were close to mine. They said my chemicals were balanced except TA and CH. They measured my TA at only 100 and should be increased to 125-150. Also, my calcium hardness was really low and I needed to add 19 lbs of their product. I thought that wasn't necessary for vinyl pools so I didn't buy it.
About a month ago, I cleaned out my sand filter for the first time since I moved into the house (5 years ago). The laterals looked fine. I then replaced the 300 lbs of sand with 150 lbs of Zeosand. I followed the instructions on the bag - long backwash and rinse before filtering, which I did twice. Could the Zeosand be causing the pool to be green?
Here's a pic of the situation:
Thanks for all your help!
Zack
Good job on doing your own testing, good job on not buying the pool store product! First, one important thing to note when testing TA-when R-0009 is fresh, like yours is, it has a tendency to want to "jump off" the tip before fully forming. We put on our testing instructions to wipe the tip (I use a damp paper towel) between each drop. This goes away in a week.
