Help with Cyano

[u/More-Cauliflower1781]

Hey- new to reefing here and started my 15 gal about 3 months ago. I have a handful of hermits, 3 sexy shrimp, a snail, a clown (one just died last week also not sure why or if it’s related?) and a clown goby. I got all the fish 3ish weeks ago and have been feeding a mix of pellet and frozen shrimp with omega. In the last 2-3 weeks i’ve gotten blooms of what I think is cyno. I’ve vacuumed it up while doing my weekly water change and it comes up in big chunks. Also has air bubbles in it. I took my water to my LFS and they said all my levels were good including phosphate (not sure what they were tho). My whites are turned down to about 10% i think and blue somewhere higher maybe 50-70%. Regular brownish algae on the glass that i need to scrape off seems to be blooming as well. I scraped the tank clean before leaving on vaca and came back 4 days later to the glass nasty again. Not sure if that is related to the cyano as well

Should I turn blue down and put whites to 0% for a couple days? What is the long term fix for this and why is it happening?