yeah, once I get my CYA level proper, I'm off to doing that. But since I always have lot's of tree stuff in my pool, it will never be that stable. I got a lots of big trees and cedar hedge. Everyday is a full pool cleanup because of that. I can't wait to have my robot.
As for my vial, I flush them twice with faucet water when I'm doing with them and then once with pool water before the testing. Should be good