I have been using pool store to close my pool. Have read "Pool Closing" info on TFP& plan on closing in 2-3 wks. I plan on following TFP plan; however havebroken my wrist (cast-6 more wks.) Pool people have usually put chlorine tabs in when closing. Have ordered Polyquat and, if I follow TFP instructions, will I really need these tabs. which have CYA? I don't want to increase CYA unless absolutely necessary.