Can't figure out why my water is green

[Kcas0772]

Using HEPD will not remove the metal from your water, but it *might* temporarily hide it. If you want to try it, this product is 20% HEDP: Do NOT overdose; if the right dose doesn't help, more won't make it better. Also, this product does ultimately add phosphates to your pool water, so you don't want to add more than is needed.

Arch Metal Control @ Amazon

So i guess if it turns out the pool has metal in, but tested the tap water shows that the water is now clean, it'd probably be better to just drain and refill