alge

[StevenSeas]

Tell us about your flow. You could / should probably take care of this by:
1. continued diligent manual removal
2. increase your flow (truly believe that there is no such thing as too much flow!)
3. increased water changes

Good luck and keep us posted.

Oh, you might also want to explore a shortened light cycle.

Provided it is "red algae" ie cyanobacteria, which in and of itself is different than algae but treating it is pretty much the same. As stated manual removal will go a long way in helping. This is because with cyanobacteria it grows as strands of bacteria within itself (why it seems like it could come off in sheets) Also this will disturb it as much as possible which makes it take longer to grow back b/c first it must repair, so it gives u an edge up.
Also cyanobacteria is an anaerobic bacteria so that means it loves areas of low oxygen content. So as stated up your water flow if possible. You should have quite a bit of surface disturbance in order to allow rapid oxygen exchange into the water as well as good flow within the tanks. You might want to even point an indirect (not a ph that has a straight output but something that has dispersed flow such as a Koralia) Random currents bouncing off of glass and interrupting other currents will make some good random currents and carry nutrients away from stagnant spots as well as bring oxygen to them. This removal of nutrients from these spots is only so helpful since its an enclosed system they wont go away like in nature due to you dont have a jet stream that moves the water from the reef to the deep ocean.
So this is where the manual water changes come into play. Manually removing water and replacing it ie a partial removes dissolved organics which are bioavailable for the cyano to readily take up and grow quickly. Also to help not defeat the purpose of these partials reduce feeding and depending on what kind of food your using i recommend a few things.
If its flake - change to a high quality pellet. Flake food is all too easily picked up by a filter system and forever trapped until you clean out your wet-dry.
If its frozen - then let it thaw out and then remove all the excess fluid as this contains nitrates and phosphates that your system doesnt need
And also I recommend to back off feeding some during this time of fighting your cyanobacteria.
Also if you do one of these things such as manually disrupting it and removing as much as possible this decreases its foothold on your system and makes it more possible so an algae can take its place. So be ready for that if you dont full heartedly try to remedy all of these problems. That is why a lot of people us fuges is b/c they can put in a macroalgae in the fuge and it can help to out-compete nuisance algae and cyanobacteria in your dt. Macro algae has a different cell structure which allows it to absorb nutrients at a faster rate than a micro algae ie hair algae or "red algae"
Hope this helps and doesnt overwhelm lol any questions just post them