Low CYA

[ianwelch001]

When I opened my pool in mid April this year, I tested everything and my CYA was high at 85. I decided to forego using my frog system and used liquid chlorine up to a weeks ago.
Last week I tested my CYA and it was low. Now at 25. I've probably backwashed the pool 4 times now.
My wife and I just had our first baby Monday so Sunday I opened up a used frog pod and threw 1" tabs in it to keep chlorine in the pool while we were in the hospital. After 1.5lbs of trichlor tabs it raised the ph slightly and kept chlorine in the pool. Now that I'm home and have a huge bucket of these 1" tabs I want to use them up and since I need to raise my CYA I figured I would just use these to raise the cya slowly while also keeping chlorine in the pool since I don't have time right now

Is this something that makes sense?
Once the CYA increases I would stop using the tabs and go back to liquid.

Any thoughts on doing this?

 

[Bperry]

When I opened my pool in mid April this year, I tested everything and my CYA was high at 85. I decided to forego using my frog system and used liquid chlorine up to a weeks ago.
Last week I tested my CYA and it was low. Now at 25. I've probably backwashed the pool 4 times now.
My wife and I just had our first baby Monday so Sunday I opened up a used frog pod and threw 1" tabs in it to keep chlorine in the pool while we were in the hospital. After 1.5lbs of trichlor tabs it raised the ph slightly and kept chlorine in the pool. Now that I'm home and have a huge bucket of these 1" tabs I want to use them up and since I need to raise my CYA I figured I would just use these to raise the cya slowly while also keeping chlorine in the pool since I don't have time right now

Is this something that makes sense?
Once the CYA increases I would stop using the tabs and go back to liquid.

Any thoughts on doing this?

How are you testing the water? CYA doesnt usually go down that easily. Chlorine tabs lower the pH, not raise it. The taylor CYA test also stops at 30ppm (on some it goes to 20 but its not so reliable that low)

 

[ianwelch001]

How are you testing the water? CYA doesnt usually go down that easily. Chlorine tabs lower the pH, not raise it. The taylor CYA test also stops at 30ppm (on some it goes to 20 but its not so reliable that low)

I'm using a tf-100 kit. My CYA tube goes down to 20 and I lose the black dot between 30 and 20.
I also have a water guru and when I tested it against the tf 100 kit, the CYAs were matching.

My WG was reading 25 and I was midway between the 20 and 30 on the CYA test tube

 

[Bperry]

I'm using a tf-100 kit. My CYA tube goes down to 20 and I lose the black dot between 30 and 20.
I also have a water guru and when I tested it against the tf 100 kit, the CYAs were matching.

My WG was reading 25 and I was midway between the 20 and 30 on the CYA test tube

If the dot disapears between 20 and 30, then it should be reported as 30. The test will go even faster if you only fill up to the decade lines and then check the dots visibility. The FC requirements are the same for 25 and 30 so theres not much point in measuring for 25. You might have noticed the WG isnt trusted so dont post any numbers from that.

If the tablets are just trichlor then they are ok to use if you want more CYA. If they have the fancy frog minerals in them, then you dont want them in your pool.

 

[Deb04]

Congrats on new baby!

 

[ianwelch001]

If the dot disapears between 20 and 30, then it should be reported as 30. The test will go even faster if you only fill up to the decade lines and then check the dots visibility. The FC requirements are the same for 25 and 30 so theres not much point in measuring for 25. You might have noticed the WG isnt trusted so dont post any numbers from that.

If the tablets are just trichlor then they are ok to use if you want more CYA. If they have the fancy frog minerals in them, then you dont want them in your pool.

Thanks. Yeah I've noticed the water guru to be somewhat accurate. Not accurate like a test kit, but I can tell if there's a safe amount of chlorine for swimming if I'm not home and also water temp and flow.
It actually saved me one day since I saw I had no flow and never would have noticed since we didn't use the pool for a few days. The timer on metal piece had wiggled out so I was able to resolve that the same day.
Also helps when it starts to show the flow rate decreasing everyday, I know it's time to backflush