Finally taking ownership and would like to check if I do things correct?

Dominique81

Member
Sep 30, 2019
10
Costa Blanca, Spain
10 days ago I filled up the pool from our rain water collecting tank.
Next day I had the following test results:

FC 1.4
CC 0
pH 7.5
TA 50
CH 130
CYA 40
Temp 61
CSI -0.93

First I have adjusted total alkalinity by adding baking soda (2900 grams in total) till I reached 70.
Hereafter I adjusted calcium hardness by adding calcium chloride dihydrate (11300 grams in total) till I reached 260.

Today I have filled up the pool with water from our rain water collecting tank (pH > 8, TA 50, CH 50).
In the meantime pump was running and added 0.5 L of liquid chlorine as well.

After 2 hours I had the following results:
FC 4.4 (target 5)
CC 0
pH 7.8 (target 7.5)
TA 80 (target 80)
CH 260 (target 270)
Temp 62
CSI -0.07

PoolMath advised me to add liquid chlorine, lower pH and increase CH.
I understand that I have to add liquid chlorine but what would you do with pH and CH as they are very close to their targets?

Was my plan of attack correct or would you have done it differently (if I am correct you can see my logging)?

Thank you.
Dominique
 

JJ_Tex

Bronze Supporter
Jul 17, 2019
1,551
Prosper, TX (DFW)
Those numbers look pretty good. I would not adjust the PH until it gets 8.0 and add some clorine to keep it in the 5-7 range.

Have you stocked up on liquid chlorine? I would imagine bleach is hard to come by. Good luck with everything going on over there.
 

Jimrahbe

Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
18,817
Bedford, TX
Dominique,

Things look good to me...

With a CYA of 40 you should try and keep your FC between 5 and 7.. The minimum is 3, but think of 3 as falling off a cliff.. How close do you really want to be??

Other than adding a little Liquid Chlorine, I would do nothing.

Thanks,

Jim R.
 
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Dominique81

Member
Sep 30, 2019
10
Costa Blanca, Spain
Dominique,

Things look good to me...

With a CYA of 40 you should try and keep your FC between 5 and 7.. The minimum is 3, but think of 3 as falling off a cliff.. How close do you really want to be??

Other than adding a little Liquid Chlorine, I would do nothing.

Thanks,

Jim R.
Ok thank you Jim!
The app had set the target at 5 but I will adjust the target to 6. Forgot to double check this.

Thanks Dominique