circulation also plays a big role in algae. Good circulation is a must. Usually if i have spots of algae I look at the circulation, I play with the flow and spot treat with h202 depending on the algae and then go from there.
I had true SAE and never got aggressive. They do their part controlling algae, and usually stay around my ottos.
i mainly use h202 for bba. Thats the main algae i get once every few months when I get lazy haha