Pool clear but not crystal clear

[nuce70]

Pool was crystal clear then all of the sudden I noticed it was clear just not crystal like it should be

Here are my most current readings

Cya-50
FC - keeping at 7
Ta -90
Ch - 90
Ph 7.8

The only big change from the last time I checked all my numbers is the ph is higher. Any suggestion? Should I SLAM?

Thanks

 

[Texas Splash]

A SLAM certainly is a possibility. Better to knock it out early if needed. I would suggest you perform an OLCT and check/post your CC (combined Chlorine) levels. Together, those may help to confirm your suspicions.

 

[kimkats]

I have found that a higher than normal PH for my pool will take away some of the sparkle.

Lower your PH to 7.5 and run a OCLT. That should help you see what might be going on.

Kim

 

[nuce70]

My CC is currently 0 ( just tested it)

My FC is 6.5 tonight at 9:30pm, I'll post my FC for tomorrow AM.

What kind of overnight loss would I look for to SLAM? And what is that overnight loss telling me is going on?

Also should I be running 24/7 until I get the problem fixed ?

Thanks for all the help

 

[jaduck]

If your FC drops more than 1 ppm that indicates organics are in your pool and you need to SLAM the pool. During the SLAM run your filter 24/7.

 

[pooldv]

I would lower PH to 7.2-7.4 and see how that goes. My pool is a little nicer with lower PH.

Here is a write up of the OCLT, Pool School - Perform the Overnight FC Loss Test (OCLT), it will tell you if there is organic matter in the pool consuming chlorine.

I don't think you need to do it.

 

[Casey]

How'd the OCLT go? We're breaking daylight n you should have already performed the test.

 

[nuce70]

FC was still 6.5 this morning at 7:00

 

[Defgufman]

Maybe a filter cleaning is needed

 

[robfico]

I agree with the filter cleaning. When my DE filter got full water seemed hazy. Cleaned filter new DE and 2 days later sparkly again

If your chemistry checks out and no signs of algae for SLAM then check the filter.

Sent from my SM-G920V using Tapatalk

 

[kimkats]

Sweet! Just work on your PH and see what your water looks like after that.

Kim

 

[nuce70]

The sand in my filter was changed last year. I recently backwashed and my clean psi is 17 and the current psi is 18.

I'm going to lower the pH and see what that does.

Thanks for all the help and I'll update later

 

[tim5055]

Funny as it sounds, a dirty sand filter actually works better than a clean one. I usually add Cellulose Fiber DE replacement powder to my filter after I backwash.

Check out this article in Pool School - Add DE to a Sand Filter

 

[nuce70]

Yea I've heard that too, I try not to backwash too often. I've tried the de in the filter before but every time I do it the pressure rises after an hour or so and I have no return pressure back into the pool. Almost like the filter is dirty again. I wasn't adding much, about 1 cup total, but it just didn't seem right. Should I try with less de? If I see a rapid rise in pressure is that telling me my filter is catching the smaller particles?

 

[tim5055]

Yea I've heard that too, I try not to backwash too often. I've tried the de in the filter before but every time I do it the pressure rises after an hour or so and I have no return pressure back into the pool. Almost like the filter is dirty again. I wasn't adding much, about 1 cup total, but it just didn't seem right. Should I try with less de? If I see a rapid rise in pressure is that telling me my filter is catching the smaller particles?

yes, you only add enough DE to get a 1psi rise in pressure.

 

[wjr75]

I can tell when I need to add acid to lower the PH by almost just looking at the water. In my pool the lower PH makes a difference.

 

[pabeader]

from the other posts I've read, you might only need 1/4 lb of DE. Just put in a small amount, like a few tbls., and watch your psi. Like Tim said, you are looking for a 1 psi increase.

 

[nuce70]

Looks like the ph worked ... Got it down to 7.2 and this morning the water already looks better

Thanks

 

[tim5055]

Looks like the ph worked ... Got it down to 7.2 and this morning the water already looks better

Thanks

Great!