Using Trichlor tabs to increase CYA

Nope.

To raise CYA they can be a bit slow. In your climate I would suggest using CYA powder now to get to 50 ppm CYA.

But they are great when you are going to be away from the pool for a few days. Add them to a floating dispenser and when you return remove the dispenser and test your CYA so you can follow the [FC/CYA][/FC/CYA] based on it.
 
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