Is the DPD Kit made by Taylor (sold at Leslie Pools) not same type of chemical testing as the HTH taylor K2006?

I wanted to know cause it seems I have a 5 way Kit and I am only missing the ability to test for CYA levels. I need to gain that ability to test soon cause I am going through the bleach and have only added the CYA that would be in my Trichlor tabs for the last few days.

Is there a decent stand alone CYA kit I can get so I dont have to repurchase the whole thing?

Also how would I calculate a best guess to get my CYA to 30 ppm for a pool just under 2000 gallons?

Thank you again in advance.