Water Feels "Hard" - Calcium Hardness?

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D

dd564

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Mar 15, 2016
31
Shakopee
I've been balancing water chemistry via the TFP method for a couple years. We run SWG, and despite having good levels of salt in the water, our water still feels "Hard". I just did a CH test, and we are about 250. Our refill water from the city is at least this high. I think our pool water hardness has gone down over the last couple years from adding acid and getting TA in line. We were very high in TA when we first opened a couple years ago. We ran pretty high CYA last year of about 80.

I'm debating if I need to take drastic measures to get our CH down. When we are on vacation my wife always mentions how other pools feel "softer".
 
A CH of 250 is low for me. Our pool water can have a CH of 1000 after about a year and feels very refreshing.
Can you post a full set of test results?

Adding acid does not reduce CH. You can only reduce CH by removing water with higher CH and replacing it with water with lower CH.

Water that is drying is normally due to pH out of range or CC in the water.
 
mknauss said:
A CH of 250 is low for me. Our pool water can have a CH of 1000 after about a year and feels very refreshing.
Can you post a full set of test results?

Adding acid does not reduce CH. You can only reduce CH by removing water with higher CH and replacing it with water with lower CH.

Water that is drying is normally due to pH out of range or CC in the water.
Click to expand...

I'm just getting things started. We had to re-add water after winterization. I'll take a sample later and post results.
 
Richard320 said:
Do you put antifreeze in the lines? That can react with bleach and irritate skin.
Click to expand...

The closer used RV antifreeze for the lines. When opening I flush that out so it doesn't go in the pool.
It's not a "hardness" thing right now as is it all season.

When we first opened 2-3 years ago, our skin would feel dry when coming out of the pool like we needed a hand moisturizer.
That was when PH was in range but a higher TA which has slowly come down over time through constant re-balancing with Muriatic Acid to keep PH in range.
 
Be sure your water sample is 70F or above for the CYA test.

Your SWCG is pretty small for your pool. I assume you run it for 24 hours per day or nearly that in swim season. EDIT - saw the autocover, never mind.
 
I'll try it but one year I had almost over loaded the CYA from trying to test at too cool of temperatures.

I know last year we were at 80-90 for CYA and pool closer lowered the level for closing and we refilled with new water. I would guess we should be in the 60-70 range but will verify with multiple tests before adding.


(Regarding the other post, yes, we have autocover. I ran the Ichlor30 last year for about 8 hours a day between 50-100% depending on weather. In the dog days we started to get a little low at times at that pace.
Pool stays pretty clean. Not much ends up in skimmers, etc.)
 
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