The "cloudiness" causes the dot to disappear. On my test tube the dot is actually on the outside of the tube, so it's not even physically possible for it to be "bleached out" by the solution.
Re: Black dot in CYA test
The "cloudiness" causes the dot to disappear. On my test tube the dot is actually on the outside of the tube, so it's not even physically possible for it to be "bleached out" by the solution.
Sherra
Kershaw County South Carolina
18x34 IG 2' radius rectangle vinyl liner (approx 27,500 gal) 1 1/2" pipes installed March 2006
(previous AG pool owner)
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