View Full Version : lighting and coralline algae

12/16/2009, 06:09 AM
My tank has been up and running with live rock for about 4 months now. I am just using the lighting that I had used with my freshwater set-up. My thinking was that I could put off spending money on the better lighting until the tank was ready to start adding corals. I'm now wondering if this was a bad decision because my live rock looks really bleached out. How much has died due to inadequate lighting?

John Zillmer
12/16/2009, 06:16 AM
Don't know -- what's the specs on the lighting? Was there CA on the rock when you got it? Did some die in the cure cycle (early on) or over time?

Coralline algae growth/maintenance has as much to do with lighting as it does with water chemistry -- stable nitrogen cycle, stable high calcium (400-450ppm), stable high KH (8-12 DKH). If these parameters are not maintained, CA will die off.

12/16/2009, 08:32 AM
I honestly dont know exact specs on lighting. I know it is just two regular flourescent tubes. I'm not sure if there was any coralline on to begin with. I know it wasn't colorful, but there was some smooth white areas that looked like coralline that has lost its color and those spots are still there.

12/16/2009, 08:36 AM
the strong UV from a MH lamp can bleach coralline. it does well in low light.

it also does better in a good flow. besides that, what JZ said above.....

12/16/2009, 11:18 AM
Once the coralline adjusts to the increase in light you will have it back. I have 2*250 MH + 4*54 T5 over my 75 and the coralline in my tank grows annoyingly well.

John Zillmer
12/16/2009, 12:10 PM
the coralline in my tank grows annoyingly well.

I wonder if there is anything that is a not plague when there is too much of it. Well, I can think of one thing, but I meant anything reef-related:)