is this blue?

[mknauss]

Yes. I would skip the salt and use liquid chlorine until your water warms up. The SWCG does not produce chlorine when water temp is below 55F or so.

Do you have a proper salinity test kit? If not, only use enough salt to get to 2800 ppm or so. Then see if the SWCG is happy. If not, add more salt. But again, I would wait until the water warms.

Have muriatic acid on hand as you will want to work your TA down by lowering the pH to 7.2 or so when it hits 7.8. It will rise pretty rapidly until your TA drops.

 

[jgofnj]

Again, are you not suppose to fill up to 25ml for this test? That will skew the results.

 

[mknauss]

Again, are you not suppose to fill up to 25ml for this test? That will skew the results.

For those of us with high CH levels, we use a 10 ml sample of water and multiply our results by 25.

 

[jgofnj]

OH. OK, got it now. Thanks for the clarification.

 

[Oceansol]

Shouldn't that be filled to 25 ml? That could be the problem.

Hmmm. the instructions in TF100 said to fill to 10ml for CH???

 

[mknauss]

Hmmm. the instructions in TF100 said to fill to 10ml for CH???

That is correct. Multiply each drop by 25.

 

[Oceansol]

Yes. I would skip the salt and use liquid chlorine until your water warms up. The SWCG does not produce chlorine when water temp is below 55F or so.

Do you have a proper salinity test kit? If not, only use enough salt to get to 2800 ppm or so. Then see if the SWCG is happy. If not, add more salt. But again, I would wait until the water warms.

Have muriatic acid on hand as you will want to work your TA down by lowering the pH to 7.2 or so when it hits 7.8. It will rise pretty rapidly until your TA drops.

I don't think my water temp ever gets below 60ºF, so I think I'll go with salt.

Thank you again!

 

[Costas > DownUnder]

Here is what the overall colour change should look like when you hit the spot....

 

[Oceansol]

Thank you! I retested today and got these results:

pH 8.2
FC 3.5
CH (42 drops) 1025
TA 110
CYA 25
CSI .88

I will be draining tomorrow. Pool math says about 60% should be replaced.

On Thursday it POURED rain. We got almost 4 inches in 2.5 hours. I had to drain some of the pool to keep it from overflowing. I wasn't sure how the storm (and draining 4-6 inches) would affect the test results.
thanks to all who replied!

 

[JamesW]

Be careful since it recently rained. If the ground water is still high, you could float the pool.

 

[Oceansol]

Fortunately we are on the top of a hill, so i dont think that will be a problem!

Turns out something came up anyway so I'll have to wait until next weekend