What are the main contributing factors in a Cyno outbreak? Fix?

[Zoaelite]

Originally Posted by angelfan

Looking for ideas to treat a recent cyno outbreak. Its in my 20 gal which has been stable for some time but I just moved. Nothing has been negatively affected but it won't go away and I don't really want to do a blackout. Is it phosphate? Any ideas are appreciated.

How old are the bulbs? Over 10 months and the chance of them contributing to nuisince algea is much higher.