Well Water Test With TF-100

[Green1340]

Just received the TF-100 test kit and tested the well water that I would like to fill the pool with.

PH- 6.8
CH- 570
TA- 400

I know I can deal with the PH and TA according to Pool School. How would I deal with the CH levels? I do have city water and could do a partial fill with city water if that would be a possibility. I haven't tested city water yet but I am certain they don't have the same levels as the well water. What do you think? Is this water worth using or will it be more trouble than it is worth? Thanks for your input.

Greenhaw

 

[Richard320]

If you have a choice, use the city water. That CH is way too high. You'll be fighting scale from day one.

 

[Green1340]

I suppose that the autofill line should also be plumbed into the city water as well. Over time topping the pool off with well water would create the same concerns in years to come. Am I correct there?

Greenhaw

 

[Richard320]

I suppose that the autofill line should also be plumbed into the city water as well. Over time topping the pool off with well water would create the same concerns in years to come. Am I correct there?

Greenhaw

I would think so. Then again, if the city water has really low CH, you could blend them. Test it.

 

[Green1340]

Tested the city water, it has a CH- 70. That is much more manageable.

If my calculations are correct, a 50/50 mix would give me a calculated CH of 320. I think I will go with 60-65% city water. That should keep me closer to the CH of 300. How does that sound? I can always add a little calcium if needed.

Greenhaw

 

[Green1340]

What would be a good CH number to shoot for while filling the pool?

Greenhaw

 

[JasonLion]

I would aim for a CH level of 250 to start with. The CH level is likely to go up over time unless you use 100% city water, so it is best to start out on the low end of the range.