Hello everybody, new guy here
So I recently tested my pool water with a k-2006 kit and here are the results I got for my pool water
CYA: over 100ppm
Algae present: yes
Type of algae: yellow
So my question is, should I do a partial drain and refill to remove some of the CYA?
And also, is there a correct way to drain off some water? I dont want to damage the plaster.