Difficult stain.....
Last year we had a SWG cell failure and developed an algae bloom...mostly around the top 24 inches of water around the waterline tile. It left a stain.
Currently doing the ascorbic acid for iron. That did remove some iron and my brown plastic pool fittings are all white now.
Stain remains.
So my pH is 6 after ascorbic acid
Alkalinity around 20 after adding muriatic acid
Chlorine 0
Ca 450
Did a Jacks Magic Stain ID kit:
None of the 3 stain ID chemicals removed any stain.
Tried a tricolor puck..negative
liquid bleach ....negative
Ascorbic acid...negative
Muratic Acid does remove it.
So am thinking about draining half the pool to remove the dissolved iron and acid washing the top 24" of plaster.
Suggestions?
Thanks,
Lee
Last year we had a SWG cell failure and developed an algae bloom...mostly around the top 24 inches of water around the waterline tile. It left a stain.
Currently doing the ascorbic acid for iron. That did remove some iron and my brown plastic pool fittings are all white now.
Stain remains.
So my pH is 6 after ascorbic acid
Alkalinity around 20 after adding muriatic acid
Chlorine 0
Ca 450
Did a Jacks Magic Stain ID kit:
None of the 3 stain ID chemicals removed any stain.
Tried a tricolor puck..negative
liquid bleach ....negative
Ascorbic acid...negative
Muratic Acid does remove it.
So am thinking about draining half the pool to remove the dissolved iron and acid washing the top 24" of plaster.
Suggestions?
Thanks,
Lee