Chlorine level drop quickly

[jdw-tx]

Thanks for the quick reply. CYA is within range so I think you're right and the algae is eating the chlorine. I'll try shocking it multiple times a day.

Thanks again!

[PhantomAndy]

If you provide your chemical readings you will get more constructive help on how to get your water in shape.

I had an issue a big part of the summer last year, and it started back again this year after opening.

I thought I had my water straight (looked good), but my Free Chlorine was going away faster than I could put it in. I had a bit of an algae issue that wasn't terribly visible.

Using The Best Guess CYA chart will tell you what shock level to maintain. Get it there based on your CYA level, and do your best to hold it constant until you get to where you don't lose any FC overnight. Only then will you have the algae problem whipped. You can then let your FC levels return to the proper level based on your CYA level listed on the Best Guess chart.

[jdw-tx]

If you provide your chemical readings you will get more constructive help on how to get your water in shape.

I had an issue a big part of the summer last year, and it started back again this year after opening.

I thought I had my water straight (looked good), but my Free Chlorine was going away faster than I could put it in. I had a bit of an algae issue that wasn't terribly visible.

Using The Best Guess CYA chart will tell you what shock level to maintain. Get it there based on your CYA level, and do your best to hold it constant until you get to where you don't lose any FC overnight. Only then will you have the algae problem whipped. You can then let your FC levels return to the proper level based on your CYA level listed on the Best Guess chart.

It sounds like you had the same problem I'm having. I'm still trying to figure out all the tests to get my numbers straight. I've had the pool for 8yrs and never had a problem, just threw in some shock and I was fine.

[Watermom]

Any progress?

[jdw-tx]

Any progress?

Yes, I've kept it at about 12ppm for several days and brushed 2/day. The algae appears to be gone. Since I've started this its been cloudy & raining so I dont know if the cl will hold during a sunny day. I'm keeping my fingers crossed.

Can you recommend a good CYA test kit? I tried retesting after the pool store. They got 50 and I got 190+. I was using their number to base my best guess shock.

Thanks for all the help.