is your tank in any sort of sunlight? i dont know your situation but i can tell you what i have and it stopped my bad algae.
skimmer. the best you can afford
more flow. my tank has about 30-40 times per hour turnover with the skimmer and
HOB fuge
cleaner crew. astrea snails work awesome and an emerals crab was a real find. he eats a ton of algae
make sure your tank is not getting any sunlight. even diffused. this was my biggest problem
phosphates. get a test kit, find your source and eliminate it. i used a sponge to absorb any i might have had and use a a couple chunks of the filter type in variuos places to make sure it is gone.
cut back light a little bit. i run actnincs for 12 hours and daylights for 8. i noticde decresing the 10,000k helped out.
i also noticed i had a
CF bulb in lamp near the tank we used in the living room. this was a 2700K bulb. not good for keeping algae in check. i move the lamp
like i said, this is just the steps i have taken to stop or prevent any bad algae. i may be wrong on some of the things. i am a rookie to this "sport"
steve r