Did these Corallines seed themselves in the tank from imported seawater or did you introduce them as plants found growing in rockpools?
Its mostly imported initially on 'live' rock. However, if I place a terrestrial stone in the tank it starts to go pink with encrusting corraline algae within a week or 2, within another week or so other desirable algaes also show.Without grazing by snails though, 1st colonisation - within 2 days - is by Enteromorpha linza. In areas of the tank that snails cannot easily access this algae is predominant - its only when its grazed away that corraline algae is able to gain a foothold.I would like to be able to carry out an experiment in the sea by creating a snail proof enclosure seeded with terrestrial rock and monitor colonisiation by algaes. I believe that grazing is extremely important to the promotion of corraline algaes and would be interested in proving it.