You should fix the reason why it's growing before you try to cover it with a band aid. Tangs eat nuisance algea, some blennies will, hermits will, but none of these will stop it from growing. Nitrates and phosphates are fertilizers for nuisance algea. That's where you should be doing your work. Even if you test a 0 on phosphates and a 0 in nitrates, your tank could still be producing them, but the algea is just sucking it up faster than you can get a reading.
Reduce your feeding,
check your bulbs age,
lower your temp a degree or two,
lower your photo period an hour,
run some good gfo in a gfo reactor,
make sure you have a sufficient skimmer,
increase your flow
keep up on water changes
Do all of these and I'm sure that algea will disappear. Good luck,
Scott