Help with cyano or dinos idk which one it is

[Rodan]

Hi I have been dealing with this algae-looking stuff with bubbles on it for the last 4 months. My tank is 2 years old and I can use a turkey baster to destroy it off the rock, but it comes right back in one day. When there is blue light in my aquarium, it looks red, so I assume it is cyano. I have used chemiclean like 10 times and it hasn't done anything for me. I have done big water changes and it didn't help. My phosphate is pretty high last time I checked it was 0.4 and my nitrate was 15. I have been doing water changes to try and lower the phosphate but this algae-looking stuff keeps showing up (Seems to be cyano but still not 100% sure). Anyone got any advice I know this kind of stuff kicks people out of the hobby but I feel like running out of options since it has killed 2 of my corals already it seems like.

 

[Science/G]

Manual removal, add a UV and dose coral snow with a bacterial supplement