I would not use *any* algicide if it were me. If the algae is only on the
glass, and not the plants, you can just control it by scraping it off
weekly. The best time to do this is before you clean your filters/do a
water change, as then much of the free floating "scraps" will be removed
from your system relatively soon. The bushies/bristlenose should help to
keep your plants clear of it, and if they aren't doing the best job, you
could try adding some Otocinclus and/or a couple of SAEs. The only time
algae is really a problem is when it is directly on or around your plants.
Hope this helps. :)
Julie <><