My pool water turned cyrstal green colour a couple of days back after increasing my TA & pH, water samples were drawn from pool and back wash and was tested for both iron and copper.
(1)Pool water showed no signs of copper OR iron.
(2)Backwash water showed a slight level of iron.
I then added bleach into both water samples (1) pool water remained clear (2) backwash water turned yellow.
So i then went to reduce my pH using Hydrochloric Acid and double dosed with an HEDP based sequestrant only to find that the water has gone from light green to a darker shade of green.
I have read through some comments and heard that adding hydrochloric acid to water that contained copper could cause water to turn into a darker shade green is this true?
Would it also be possible that the trace metals got stained onto collidial particles as one article i read commented? If so should i use a floc/clarifier to treat this problem?
If not what can i do to treat my pool?
My test results as follows:
Cal Hardness: 90ppm