View Full Version : coraline algae

02/07/2009, 02:51 PM
This may be a stupid question but I won't know until I ask. If coraline algae consumes the calcium like the coral does wouldn't I want to keep it down to a very low level, maybe only on the LR.

02/07/2009, 03:07 PM
good coralline algae growth can prevent the growth of less desirable films and hair algae and contributes to system stability and health. Corals will also tend to grow and spread faster over coralline algae covered surfaces. You don't want it to overgrow the viewing windows of the tank, but don't go and sand it off your rocks.

02/07/2009, 03:19 PM
This reminds me of a Dilbert cartoon. The image is of the company boss sitting behind his desk deep in thought. The thought bubble reads, "Theoretically, if we don't produce anything, then our operating costs can be cut to zero."

The requirements of coraline algae are the same fundamental requirements of most corals and a reef in general. These are the goals to attain, not avoid.

02/07/2009, 03:21 PM
well said, Whys.

02/07/2009, 03:22 PM
I'd be more concerned about the amount of magnesium it uses. It's pretty ridiculous if you look at the differing consumption rates between corals and coralline algae.

From Randy (see the chart):

Rather than worrying about it directly, I just allow natural predators to keep it in check (e.g. Asterina spp., and M. globulus).

More info on the above described animals here:

02/07/2009, 03:36 PM
Thanks guys. I was thinking about scraping it off the back. I'll leave it alone.

02/07/2009, 03:48 PM
Some scrape it off the back. Some don't bother. I have a black back and like the contrast and definition it provides. But my tank is still young and it does help my tank mature. So at the moment, I'm leaving it. I will scrape it off in another month or so and then keep it scraped off.

This is mostly a matter of personal preference. Either way, it's appearance is a good sign. You are achieving success. :)