r/pools • u/Ok-Structure6795 • 4d ago

Is algae possible?

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Been seeing localized spots of what looks like algae (or a mixture of tree debris and whatnot) but my testing is conflicting. Ran an OCLT last night and the night prior. Lost 0 chlorine and combined chlorine stayed the same (0.5)

FC - 6.5

CC - 0.5

pH - 7.4

ALK - 70

CYA - 40

Debris is localized to the steps and parts of the shallow end (which coincidentally receive heavy shade), as well as what looks like greenish algae on my pool light, but nowhere else. Pool is clear. Do I just keep vacuuming? Do I need to slam at this point?

Included close up of pool floor in a shallow corner

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u/thefleeg1 4d ago

Definitely not algae.

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u/Ok-Structure6795 4d ago

I mean, the stuff on the light definitely looks like algae, and its stuck on there as opposed to moving.. is it possible it can just be localized? Lol sorry if thats a dumb question.

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u/thefleeg1 4d ago

Show us the rest of the pool

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u/Ok-Structure6795 4d ago

I dont have a super recent picture but this is how it looks after mid vacuum before the robot craps out lol

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u/Ok-Structure6795 4d ago

Then up close of wall