i used to have lots of hair algae, but my tang and blenny eat it all. they loved it, so i want to grow some more of it for them. i've been overfeeding my fish and corals, but still can't get to grow any, only some type of red algae that nobody likes. is there any plants that i can put in my tank for my fish to eat? i haven't seen plants anywhere around here, just corals. i do give them nori, but i don't think that nori has everything in it that fish needs.