I've tried the green grass type algae we get all around EL, cant say if it would survive or not as my hermits devoured it within a day...maybe its some hermit crab delicacy?? I have had the red almost lettucey type in my tank for about 2 weeks now and its still alive, hasnt died back or grown either so still waiting on that one.
I've been looking for a suitable macro algae for herbivorous fish thats not as risky as caulerpa.