False negative metals test??

[smithp]

Having trouble getting pool from Orange to clear. After adjust TA and pH. Took sample to locals Leslie pool supply and they tell me no iron or copper. Every time I try and add chlorine the water turns orange/brown. Use ascorbic acid and it clears again. Took test water after using AA. Could this give me false test for metals? If AA is clearing it, isn't it a metals problem or could it be other?

FC = 1
TA = 110
Cya = 90-100
CH = 0
pH = 7.5

 

[Richard320]

I wouldn't trust any of Leslies tests. You're describing Iron in the water if you ask me, no matter what they say. The only possible defense is if you added a sequestrant. That will bind to the metal and prevent it from showing.

Check my reply in this thread and look at the pictures in the linked threads Water turning Brownish Green after adding Chlorine

 

[smithp]

Thanks. Will retreat AA. Add sequestrant. Paper towels. We'll see.

 

[Richard320]

Thanks. Will retreat AA. Add sequestrant. Paper towels. We'll see.

I think you want the rust to appear so you can snag it. Don't sequester it yet. Let the pool turn orange/brown and remove the Iron with paper towels or pillow filling. Then treat whatever's left.

 

[duraleigh]

+1 what Richard says. That's iron. Your sand filter will also filter it out (now that it has precipitated).

 

[smithp]

Need to borrow a big truck and trailer. Going to drag pool off into the woods and leave it.

Apparently haven't gotten the metals out. Every time I add chlorine it goes brown. Any step by step on how to make a filter (like I have seen in pics posted) to catch the metals or do the paper towels work as well (did not seem to work for me).

So if I am hearing right, raise chlorine from 0 (where it is), let metals precipitate, do the paper towels, then add AA for stains and Metal Magic (or magic mike) as the wife calls it to keep metals in solution???

Man this pool makes me feel dumb!

 

[smithp]

Gonna try a copy this over to chem 201