I use 2 floaters with ITS Trichlor (?) tablets in 30k gallon outdoor pool, no cover, DE filter. I took the floaters out 3 days ago, but the chlorine level has stayed at 9-10. There has been full sun too.
After taking out the floaters I've noticed a green hue setting in and translucent specks floating in the water (maybe just coincidence?). So, I'm not hesitant to stop chlorinating.

I read the Best Guess Chlorine Chart. High alkaline means high stabilizer right? Does that mean it is safe for me to use higher levels of chlorine (~10)?

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Understandable, terms of registration.
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Oh and do I have to worry about the stains becoming more permanent if I don't deal with it now? I don't mind the stains that much and it will be in use soon, so I can't afford to have too much time tied up in dealing with the metals in the water. So, I'll probably just leave it alone until after that time.

Forgot to mention, it's a vinyl liner pool.