Best Red Algae Control??

[mechano]

Agreed. Canister filters are a problem waiting to happen, and tend to become nitrate traps(if filtration is used)
In the the time in this hobby I have never ever ever ever found a good 100% solution to hair algae-red or green when it comes to fish or inverts.

I think the only way to truly fix the problem is:
1/Water changes
2/clean rock or and hope stuff doesnt grow back
3/lower nutrient import into tank
4/ And if none above works, take out the bad piece of liverock and boil it because there is probably something in the rock like a dead crab or worm that has sparked the algae bloom on that rock and allowed the algae to gain a foot hold. IMO of course.

good luck