I recently found a small, quarter sized, brownish looking (almost like dirt) on the first step into my pool. This first step is about 4 inches under water and possibly has bad circulation. I picked it up and it was slimy, brown and almost translucent. I scrubbed it with my 50/50 brush and it was hard to get rid of the stain behind it, but it came off.
Anyways, I started to get worried so last night I did an overnight FC test and my FC went from 10 down to 7.5 this morning. The water is clear and CC is .5 or less. Is this stuff mustard algae? My current CYA is about 70 and what I don't want to do is spend large amounts of money to achieve mustard algae shock levels when it might be a lesser form that I could kill with regular algae levels.
Readings:
FC - 7.5
CC - .5
CYA - 70
CH - 320
TA - 80
pH - 7.7
Salt - 3400
Borates - 10
Anyways, I started to get worried so last night I did an overnight FC test and my FC went from 10 down to 7.5 this morning. The water is clear and CC is .5 or less. Is this stuff mustard algae? My current CYA is about 70 and what I don't want to do is spend large amounts of money to achieve mustard algae shock levels when it might be a lesser form that I could kill with regular algae levels.
Readings:
FC - 7.5
CC - .5
CYA - 70
CH - 320
TA - 80
pH - 7.7
Salt - 3400
Borates - 10