What kind of chlorine is hth?
Yes, it is best to test chlorine every day as chlorine is a consumable item in pools. You should add it each day also after testing. The chlorine level is based on the CYA level. With 30ppm CYA, that would make your target chlorine 5ppm and never below 2ppm.
Which test kit did you buy. The typical OTO chlorine test doesn’t have lines, it is a color match test.
Yes, it is best to test chlorine every day as chlorine is a consumable item in pools. You should add it each day also after testing. The chlorine level is based on the CYA level. With 30ppm CYA, that would make your target chlorine 5ppm and never below 2ppm.
Which test kit did you buy. The typical OTO chlorine test doesn’t have lines, it is a color match test.