Does the blackout work for hair/green algae or are you referring to Blue-green algae (BGA)?
If it is BGA do the following,
1. Scrape any visible algae and siphon it up
2. Wash your media
3. Do a blackout (I did a four day blackout as my BGA then was starting to cover the foreground)
4. No CO2 or lighting at all (have to ensure that it is a total blackout without any penetrating lightsource at all!)
5. After the fourth day, do a 50% waterchange and clean your filters again.
6. Dose KNO3 (be a little generous) and resume your fert regime and upkeep it.
Don't know if Carbon will help clear your tank from algaes, however a UV steriliser might help kill the algae spores but would also wipe out the trace elements that your plants need (correct me if I am wrong).
So far for my case, the BGA is gone.
Also why do you want to remove your Biohome for? If you do that, then you'll not only have a algae issue but a BB crash, big time and end up with 2 problems.
Hope this helps you.
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