macroalgae: which is best?

[SeaHorse_Fanatic]

Red halimenia is a soft macroalgae, while green halimeda is a calciferous hard plant.

I found that red halimenia likes to have high iodine levels, because if I didn't supplement iodine regularly, it started to fade. (usually used Lugol's solution)



Here's an old pic of some red halimenia with my little seahorse hanging on.

Anthony