Recommended numbers for my pool

[kenny]

I read through pool school and was wondering if those numbers would be sufficient for my pool.

I'm targeting......

FC 3
PH 7.6
TA 90
CH 300
CYA 70
Borates 50

Those numbers give me a CSI of -0.26

Pool specifics are in my signature and also run a water fall when pump is running. I'm noticing a significant PH rise though with the fall on when the pump runs so I may turn the fall off more often to help stabilize the PH.

Any recommendations on numbers are welcome.

 

[PaulR]

The Chlorine/CYA chart in Pool School gives a minimum FC 5 for CYA 70.
--paulr

 

[kenny]

Would a higher TA help stop the upward drift of PH with the SWG and waterfall?

 

[PaulR]

No, you need a lower TA to reduce the rate of pH rising.

You said CSI was -.26, which made me nervous about suggesting you reduce TA any further. But I double-checked your numbers in the Pool Calculator; to make everything work out it looks like your water temp must be about 60F. CSI will go up as the temp goes up, so lowering your TA is probably okay.
--paulr

 

[kenny]

My water temp is about 81F.

 

[kenny]

Keeping the PH at 7.8 and TA at 90 would give me a CSI of -0.1 or even allow me to lower the TA more with the water feature running.

Is 7.8 too high though or should I keep it at 7.6?

 

[Butterfly]

Hi Kenny,

Have you seen the Water Balance Tips for SWGs in Pool School?

Also, Waterbear has a tip page here that may help answer your q's:
water-balance-tips-for-a-swg-t3663.html

 

[JasonLion]

The Chlorine/CYA chart in Pool School gives a minimum FC 5 for CYA 70

This is a SWG pool, so the minimum FC is 3 for CYA of 70.

You actually want the CSI to be a little negative, -0.3 or a little lower in many case. The CSI inside the SWG cell is much higher than it is in the pool in general, and the same is true inside the heater (if you have one).

I would aim for a TA closer to 70.

 

[kenny]

Thank you! Is CH ok at 300 then with the lower TA?

 

[Butterfly]

Thank you! Is CH ok at 300 then with the lower TA?

Recommended CH level is between 250 - 350, so I'd say you're perfect.

You can read all the Recommended Levels in Pool School.

 

[PaulR]

This is a SWG pool, so the minimum FC is 3 for CYA of 70.

Ah, missed that--kenny didn't give a salt level and it didn't click that Intellichlor is a SWG. Oopsie!
--paulr

 

[Butterfly]

Kenny, it would be good if you added SWG along with Intellichlor IC40 in your sig.

Those of us that do lots of reading could use all the help we can get! :lol:

 

[kenny]

Done.........and again thanks for all the responses.