Coralline Algae

What is your calcium at and what sort of lights do you have?

 

Keep your calcium levels between 420-450 and buy yourself some "Purple Up" made by CaribSea. Stuff works great and maintains calcium real nice. Some may say u need more lighting and might be true but in my 29g biocube I have 4x36w pcs and when I added the LR a few months ago it had a few little spots here and there, dosed as directed daily from day one and now every inch is literally 100% covered with purples and pinks and looks absolutely awsome! Time is your biggest enemy right now but like i said, only took a few months for me so id recommend the product.

Let us know how it goes....

 

I find coralline Algae grows best for me under the type of lighting you have. +1 on the purple up it works sweet you could also try Marc Wess coral vital it works great to.

 

Just be patient I would say. Have you had the rock with the coraline in your tank for the full two months? I had a rock with tons of coraline in my tank at the start and it has been around 3 months. I didn't really notice any spread at all until maybe 3-4 weeks ago and it is going pretty rapidly IMO. I also use the API test kit and think it is just fine for calcium. I have compared with salifert at a local lfs and they were within 20 ppm of each other, which I think is plenty good enough for a test like calcium levels. I also recently got an emerald crab which loves to pick at the coraline. I think that may help release spores and help it spread along the tank because I have seen rapid growth since then. It could just be wishful thinking on the crab though.

 

If the coralline "just showed up in the last couple of weeks", then you are on your way.
My tanks will typically have a time delay before the coralline explodes, as others have noticed.
Give it time.
Someone once said:
"Nothing good happens fast in a reef".
-Eric