CH for new plaster - PebbleTec vs TFP

[EndlessSummerAZ]

Currently on day 7 of our new pool PebbleTec start up. We’re in Phoenix with hard water. I haven’t tested our fill source yet.

I’ve noticed our calcium hardness had gone up a small amount the last two days from 250 to 275. This is out of range for PebbleTec’s start up recommendations of 150-250 but within range for TFP.

Should I lower this to the manufacturer standard? I don’t want to ruin my new finish but also don’t want to stress about keeping it in a range that it doesn’t have to be in.

 

[reggiehammond]

Are you filling with softened water?

 

[mknauss]

Your fill water CH is likely 250+ppm CH unless as reggie asked you are using softened water.

 

[EndlessSummerAZ]

Are you filling with softened water?

No. Straight from the city source.

 

[EndlessSummerAZ]

Your fill water CH is likely 250+ppm CH unless as reggie asked you are using softened water.

If fill water is 250+ does that mean we will have to constantly reduce CH? No way around it, it seems.

 

[mknauss]

Without softened water for make up water, you will drain the pool every other year to reduce CH. You will have to aggressively manage CSI the 2nd year to reduce waterline scaling.

 

[ajw22]

Should I lower this to the manufacturer standard?

No.

I don’t want to ruin my new finish but also don’t want to stress about keeping it in a range that it doesn’t have to be in.

Higher CH will not ruin your finish.

Manage your CSI of which CH is a part of to keep your water from scaling your finish.

Calcium Saturation Index (CSI)

How is CSI calculated? Very simple – use our PoolMath tool. To ensure long plaster life and save money, click here to learn more.

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