got me thinking now, might find a small LED lamp and sit it againts the back plastic of my hang on filter, turning the bio grid into an algae scrubber, don't think I need it just yet as the live sand de-nitrifies the water.
p.s. found some awesome red algae yesterday, its already clung onto the ground and looks like its growing. found it in a low light area too. hopefully it can out grow what the snails eat