Out-of-Stock Coralline Algae Purple Helix Coralline Algae In A Bottle - Pre Order only 0 Review(s)  £29.95 Purple Helix® Coralline Algae includes, as oppose to most available coralline algae supplements, 8 species of live coralline algae spores of Purple, Magenta, and Lavender. along with beneficial nitrifying bacteria. There is no faster way to turn your bare rocks into beautiful and coralline encrusted live rock. Purple Helix pre-order is now closed for... View