New Fill off city water

[Fire]

Just be sure you test with your K1766 salinity kit after adding 2/3rds or so to narrow down exactly how much you need. Otherwise, add them now.

Does the k1766 kit expire? Only asking because the best price I could find up here in Canada is a 3 pack from Walmart for $83. Amazon sells it as well but it's $65 for 1. Thx!

 

[mknauss]

Most tests last at least one swim year.

How are you testing your salinity now?

 

[Fire]

Most tests last at least one swim year.

How are you testing your salinity now?

I'm not testing it at the moment as I haven't put any salt into my pool yet. I'm in the same boat as Snmobley - filling new pool off city water. You responded to my thread yesterday a couple of times (thank you so much). I don't want to hijack this thread tho. I put 30 CYA and brought my FC to around 5. I'm going to bring my CYA up to 70 tomorrow (via liquid form) as I'm working today. Then I planned on adding 200kg of pool salt (18,500 gallon pool). And let the filter run for 24 hours before turning on my SWCG. I have ordered a k1766 from Amazon, but like the K2006 I ordered yesterday it won't be here till mid June. Can I use strips or buy a cheaper version of the K1766 to test for salt until it arrives?

 

[mknauss]

You can try salt test strips. They may work OK when new. But will degrade rapidly due to humidity. If you can just sneek up on the salt level that makes your SWCG happy, then you are OK. The K1766 comes in handy later for when your SWCG says low salt. You want to confirm that the salinity is really low as SWCG failure modes typically start with reporting low salt.

 

[Fire]

You can try salt test strips. They may work OK when new. But will degrade rapidly due to humidity. If you can just sneek up on the salt level that makes your SWCG happy, then you are OK. The K1766 comes in handy later for when your SWCG says low salt. You want to confirm that the salinity is really low as SWCG failure modes typically start with reporting low salt.

Ok great. Thanks for moving my posts. Do you know of a calculator to tell me how much salt to add for my pool or just go with the 200kg and take it from there?

 

[mknauss]

PoolMath

 

[Fire]

Did not know about a SWCG. Issue I see is you do not have a test kit to manage FC and CYA levels. Up to you. Add the salt and circulate for 24 hours. Raise your CYA to 70 ppm. Follow FC/CYA Levels

I was told that if my CYA is too close to 70ppm that I may risk "chlorine lock" is this true?

 

[mknauss]

'Chlorine Lock' as described by pool stores is a myth. But, high stabilizer concentrations makes your free chlorine in the pool ineffective.
I suggest you read ABC's of Pool Water Chemistry and consider reviewing the entire Pool School eBook.