ok i finally tested my swamp...i mean pool...with a dpd test

[CarlD]

Lower you pH to 7.3-7.5 and the chlorine will be FAR more effective--and may just get rid of those dots.

BTW, you need to brush your pool everyday when you have an algae bloom--knocks the algae loose where the chlorine can get at it. That WILL get rid of those dots. Forgot to mention that-still rusty as I haven't even begun the pool opening process.

[fog80]

Lower you pH to 7.3-7.5 and the chlorine will be FAR more effective--and may just get rid of those dots.

BTW, you need to brush your pool everyday when you have an algae bloom--knocks the algae loose where the chlorine can get at it. That WILL get rid of those dots. Forgot to mention that-still rusty as I haven't even begun the pool opening process.

thanks. i'll add some muriatic acid tonight.