Thank you.
I noticed that the black dots do not smear at all. They remain intact. Does this mean that they are not algae? Thank you for your help. I will order the test kit.
Jeanne
Thank you.
I noticed that the black dots do not smear at all. They remain intact. Does this mean that they are not algae? Thank you for your help. I will order the test kit.
Jeanne
in-ground pool
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