Wondering if this is yellow algae?

[Supervac]

I hope to find some clarity on this issue and hope this is right place to post. The outdoor swimming pool at my condo building in Chicago started to show some yellow-green discoloration on and around the walls in the pool. Building management claims it's fading from the sun over the years. I swim laps daily and I am confident it was not present when the pool opened for the season during Memorial Day weekend. About a week ago a strong storm poured a lot of rain and debris into the pool and shortly thereafter this started to form. Their reasoning is since the patched areas of the liner show a difference in color it must be just discoloration. I assume the newer patches in the corner have some sort of coating to prevent growth. ls this yellow algae or something else? It is frustrating to not get any concrete answers from the management. I understand a precise conclusion might not come without an analysis of water but I want to at least know which direction to push them in. Thanks a lot for any insight!
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[kul]

Might just be regular algae. TFP provides guidance for residential pools. Community or public pools are outside the scope due to various regulations that need to be followed. You can try doing an OCLT to confirm algae if you want to get a test kit of your own
Test Kits Compared
Overnight Chlorine Loss Test

 

[proavia]

Your condo pool may be regulated by the municipality. And the municipality will have specific requirements for chem levels and maintenance.

You can try scrubbing a small area with a nail or scrub brush to see if it comes off. If it does, show management. It's up to them and the pool service to rectify if needed.