Ideal levels! Who do you believe?

FADY2002

Member
Jun 1, 2024
8
91390
Pool Size
17000
Surface
Plaster
Chlorine
Liquid Chlorine
Hello. I'm a newbie at this so please keep in mind when responding. I have a decent understanding of what I need to do and chemistry of my pool however, I'm a bit confused with the proper target levels. For instance, the pool math app recommends target alkalinity of 50-90 where Leslie's has it at 80-120 for the same configuration of my pool. Also calcium hardness is recommended at 250-650 on the app vs. 200-400 with Leslie's. There are a few other subtle differences.

Finally, I can't find a reference to phosphate on the app but I'm testing at 333, is that a concern?

Thanks.
 
Come to tfp!

80-120 is high because they assume your are using acidic pucks. High TA buffers the acidity. We don't recommend pucks. TA 60-80 reduces pH rise and the need to add muriatic acid frequently.

200 is a bit low, below 250, the water will dissolve calcium out of a pool shell.

Ignore phosphates. In a properly balanced pool they are of no concern. If you can maintain your pool, they will never become a factor.
 
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Thanks. Honestly I'm pretty intimidated with the test kits and feel I will have varying results due to operator error. Is testing at Leslie's that frowned upon?
 
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