Reading the labels of 2 Ascorbic acid treatments, both recommended adding a "Filter Aid" to the filter before treating.
I have seen no mention of such in this thread. Surely someone read the directions on the bottle?
I can only assume this is that missing piece to filter out the lifted stains.
Directions from ascorbic treatment: ("Stain Free")
Natural Chemistry Stain Free Extra Strength 1.75lbs - 07395
Extra Strength Stainfree is an all natural stain remover that contains a blend of industrial strength ascorbic acid. It quickly removes metal staining without adding phosphates to your water.
All natural stain eliminator
Tough on old set-in stains
Compatible with all sanitizing systems
1lb per 10,000 gallons (38,000L)
How to Apply:
1. Balance pool water
2. Lower chlorine level to at least 1ppm
3. Add 1lb of Extra Strength StainFree per 10,000 gallons around the perimeter of the pool with the pump running
4. Brush pool thoroughly. After brushing, if stains are not completely removed add more StrainFree Extra Strength
5. Add a pulp based filter aid to your cartridge or sand filter. If you have a DE filter, make sure it is properly charged
6. Add METALfree at a rate of 33.9oz (1L) per 20,000 gallons (75,000L)
7. Vacuum pool slowly and thoroughly
8. After 24 hours clean filter
- Sand filters: backwash for at least 3 minutes and then rinse for 2 minutes
- Cartridge filters: clean filter and filter tank thoroughly
- DE filters: backwash and recharge with DE
9. Use METALfree as a weekly maintenance product to guarantee a stain free pool
A non-polymer filter aid must be used in sand filters with this product
Do not add any chlorine or shock treatment until the pool surface has been thoroughly vacuumed and filter cleaned
DE and cartridge elements should be removed and cleaned, sand filters backwashed
One such filter aid product I found:
Fiber Clear: The Safe DE Alternative and All-Purpose Filter Aid
claims to filter water down to 2 microns.
Thoughts on removing the metals forever by filtering....anyone tried?