I'm setting up a 55g octo tank. I'm considering putting in button polyps green polyps not sure if thats a bad idea? also with live rock I know they move it around alot should I try to secure it somehow? or just let it be.. I just don't want a rock to hit the glass and there we go dry octopus and wet floor? also what about feeding. would a mixture of market shrimp fish and the occasional live fiddler crab be ok? I'd REALLY like to get a vulgaris but if I'm not mistaken he'd be a bit cramped? 80 lbs of live rock a 125g skimmer 100 g hob and a 60g hob I'd REALLY like a vulgaris ALSO! the supplier that I'm getting them from doesn't specificly say what species its just octopus.. 30$ with shipping (no blue ringed.) oh and did I mention I REALLY want a vulgaris? what other octos are day active easy and interactive? I'd rather have a larger one if thats possible? and would feeding them freshwater clams cray dads be a no no?