Algae cures without very aggressive actions take awhile.
Some personal examples spent: 2-3 months dealing with dinos.
6 months of switching between ulva and cyano after my nutrients raised a lot more than i intended dealing with the dinos.
3 years still have a bubble here and there from bubble algae [emoji23]
I agree remove the algae, i do two things one vacuum out what i can then scrub what wont then turn all the pumps all the way up and attach a 10 micron sock for a few hours.
Grid your sand bed, deep clean 5% a day till all of it is cleaned, i use an electric gravel vac for this.
Then i feed a set amount each day till my nutrients find a home in range of detectable-10 ppm no3
Detectable to .1 po4
For rocks that come out i use h2o2 i know others feel safe using in the aquarium, i havent gotten that far yet [emoji23]
As far as what algae you have.
Its not dinos, if can get a sample out of the water and photograph on a white paper towel after most of the water has absorbed out of it could help id it. Hard to tell with the actinics.
