Quote Originally Posted by SnoopysGirl View Post
The last test indicates that the CYA is 270.
This is the only part I don't understand: Bromide - I don't know what I need this for, and when I would use it.
Assuming the CYA=270 is still correct, sodium bromide will allow you to kill algae without having to raise your chlorine level to 100 ppm or something like that. We're going to TRY to avoid having algae. But, you don't want to bet the farm on succeeding, so you need a backup plan in case you fail. Sodium bromide can be hard to buy locally, so I'm recommending that you purchase it, keep it on hand, but hopefully, never actually use it!

I did the ascorbic acid test today. . . . . Will the HEDP lift this stain, or does that just take metals already in the water OUT of the water?
HEDP might lift the stain, but probably won't. It also won't take the metals OUT of the water; it does EXACTLY the OPPOSITE! It keeps the metals IN the water. The clean up sequence is:

1. Ascorbic acid lifts the stain OFF the steps, and puts the metals IN the water.
2. HEDP *keeps* the metals in the water, once you re-chlorinate (which destroys the ascorbic acid)
3. The CuLator unit + constant filtration REMOVES the metals FROM the water.

All three steps are essential.