Why isn't my coraline algae growing!

[FragIt Dan]

I observe the best coralline growth under high flow and lower fluorescent light. A couple of brands/color temperature combinations of HQI bulbs have strongly inhibited coralline growth in my tanks. I could see the algae surviving where it was shadowed from the lights and see it bleached out where it was exposed. Silt will also inhibit growth. Try getting a clean turkey Baster and jetting some water on your rocks. If silt blows off of them you will probably have problems growing coralline in that location due to low flow. Having said that, I also get good coralline growth under my Hamilton 250w14K and Phoenix 250w14K bulbs, but more so in higher current areas.


FragIt Dan

[Money pit]

I get good growth also using Phoenix 14k bulbs. You could try crushing some Coraline and putting it into a high flow area to get it to seed other areas of the tank.

[ReefOcean]

Originally Posted by Money pit

I get good growth also using Phoenix 14k bulbs. You could try crushing some Coraline and putting it into a high flow area to get it to seed other areas of the tank.

+1. Scraping it off the glass works too