Originally Posted by
gio28
http:///forum/post/3246664
it has to be introduced before you even start to get any...like on live rock.
also...i heard that if you scrape off coraline algae into a bag or cup then dump them out in front of a powerhead that it will help spread it to new places on the rock to grow on. IDK tho since ive never done this.
purple up is something you could try too...although some people dont like it for some reason i cant remember lol. I use it and have had 0 problems...and increased coraline growth on my back wall.
The reason I don’t use purple up is it is not very cost effective. Calcium and iodide are used at different rates so one will always be off if added in one product like purple up. The reason others may say, is that you can over dose the iodide and this could have a harmful effect on some invertebrates. Though I am not very convinced of this because I can use a test kit and do, so there is no issue for me…