replace light bulb induces cynobaterica??

[Toxik]

Here is a link to look at.
http://saltaquarium.about.com/od/dia...slimealgae.htm

[apexi]

I also noticed the same thing when I upgraded my MH ballasts. Huge outbreak of the worst kind: dinoflagellates. Took a long 2 month battle to finally get rid of the stuff, much worse than cyano.

[mandarin man]

The cyno is getting worse today, a little patches every where and I am not happy at all. I have to do major clean up this weekend when doing water change.

I just recalled, before changing the light bulbs, I took out the ceramic bio and added in like 10pounds of uncured live rock. Is this the reason for the algae bloom? Need your input on this one...

[Navarchus]

I don’t know what the percentage of rocks you have add from the total weights of your rockery and if you cleaned them or cycled them but…..
Yep! That might be just it.
The introduction of dry rock to the system will cause the rise and build up of phosphate and nitrate (decomposing of dead animals in the rock into ammonia -> nitrite-> nitrate)
The cyano just loves these conditions.

[mandarin man]

I believe you are right. I don't understand that if it is the case then why cyno appears on the old rocks in the tank, not just the new ones? The question is just for my learning experience.

I tested nitrate with Salifer, it is 0.5ppm. I guess it is the end of the cycle. The cyno should clear up soon.

[banditpowdercoat]

Cyano loves Nitrates and posphates. It is usually allways in your tank. Just kept in check by the ecosystem ballance. Add something extra(the uncured liverock) and that c an throw the ballance over the edge. Same with changing the lights. Different PAR all of a suddden, can let it grow untill the ecosystem comes into ballance again

[Navarchus]

The cyano will spread in your tank in places where the water flow will “allow” it to grow….