Green Algae

not trying to tell you that the other guys are wrong because they very well may be right, but I had the same thing as you are describing. How old is your tank?

When I first started my tank about a month and a half ago I had diatoms up until the tank finished cycling, then it went away just as yours did. Soon after, I started getting lime green algae on my rocks (I even posted it in a thread somewhere asking if it was coralline). Unfortunately, it spread quickly to all my rocks and the glass. It was almost like a dusting of lime green algae. Not sure what the cause of it was but I got my CUC right after that to clear up the problem.

HOPEFULLY everyone is right in saying that it is coralline algae, because if so, then it is a sure sign of a healthy tank!

Best of luck,
Allen

edit- if it spreads like the picture above than it is most likely coralline!

 

yo Los..that pic is what the stuff in my tank looks like..both the purple and green are coralline..

my boy has some sick a## looking baby blue coralline..

 

nice! baby blue would be insane! well we'll see if my CUC will clean it up of it is coraline and here to stay!

 

Doesn’t sound like coralline algae to me – because of a couple things, appeared one day and spread already. Lets get some more facts before diagnosing.

What is the age of this tank? Why did you have a diatom bloom? Killing the lights is not a solution but a band-aid to an underlying problem. Blooms outside of a cycling tank are generally caused by silicates – can you test for silicates? Do you use ro/di? Do you have a skimmer? Dissolved organic compounds can be a factor .

Anyway, simply said – coralline algae is very slow growing, its very hard to the touch. Please tell us a little more of your tank.

A picture is worth a thousand posts – I do hope you have coralline and not an issue, but I would rather make sure we diagnose you correctly now so that nothing surprises you a week from now.

 

...btw, I like this thought "recovering coralline" still just want to get some facts first is all.

 

Hey Ghost thanks for the advice, it has not spread like the diatom did. The tank is reaching 2 months in a week. It is mainly on the white parts of the live rock and looks neon under the lights. The diatom i was told was part of the cycling and the fact that i left my "24hr reef capable LED's" on all day. well at night i'd leave the moonlights on until the next morning. I stopped that and just watched the Diatom slowly die out. I had two tiny clowns, royal gramma, 3 tiny frags; yuma, lobo, and i forget the other looks like acan coral, and CUC. Yes a skimmer and canister that i've have laying around figured more filtration is never a bad thing. the wanter params were fine when I took it to the LFS. Picked up a sun polyp and open brain.