pool test results, any changes needed other than FC?

[JimK]

Raise FC immediately! For CYA of 40 you should shoot to maintain 5ppm FC.

Also, you might want to lower pH a tad (shoot for 7.4-7.6) using muriatic acid (31.45% concentration, not the low concentration "safe" stuff).

My only experience is with a vinyl pool, but if I understand correctly, with a concrete pool you'll want to raise CH to at least 250. Hopefully someone with more knowledge of concrete pools can chime in.

[FNC1962]

Thanks Jim, I started with low Ph so I added a bit of Borax and turned the returns to aerate the pool and raise the Ph. it is coming down on its own and generally settles in around 7.3. I raised the chlorine and continue to monitor it. I keep testing for FC and CC. Not showing any CC but, having to add around 10 cups of 8.25% bleach daily to bring FC up to 5 or 5.5 ppm. Not sure why that is. Any advice for that?
Thanks!

[JimK]

Thanks Watermom.

FNC1962,

Is your water clear? If so, check to see how much FC your losing overnight. Test it in the evening after sunset, then again before the sun hits it in the morning. If you lose more than 1ppm overnight, then something is eating up the FC. In that case I would raise FC to shock level (15ppm FC given CYA of 40) and hold it there until you lose less than 1ppm FC overnight, CC is less than .5ppm, and the water is clear. During this process let the pump/filter run 24/7; keep an eye on filter pressure and clean when needed. Once all three conditions are met, then let FC drift down and maintain normal level (5-6ppm for CYA of 40ppm).

Hope this helps.

[FNC1962]

Thanks Jim, I followed your advice and believe its okay now. Now, if I could just get the birds to quit using my pool as a "dumping" place.

[JimK]

Thanks Jim, I followed your advice and believe its okay now. Now, if I could just get the birds to quit using my pool as a "dumping" place.

I'm glad it helped.

We also had a problem with birds pooping in and around the pool. Yuck! Turns out we had a couple nests near the pools; parents were pooping and were also dropping the babies poop in and around the pool. Now that the babies have fledged and they've moved along, there's not near as much poop, thank goodness!