Hi Bro, you might want to check other bros that have zoos.. for sometime.
DA, Rav-65, prev... and list goes on and on and on...
As for anemones, there some reefers with very good experience... for me it's a losing battle to keep on.
what I observe is that they will eat most of the algea ... that grows on the rocks or any surface.. I think it's because the mouth is at the bottom.
If your macroalgea is floating around, I think it's safe right? The spine will push the algea aside before it can consume it.
Had the long spine urchin to ... super rock cleaner!
the normal one... green skirting - dark and lime green... some with orange center/yellow. There is some brown skirting with a bit blue and orange center.
Nothing towards a red/pink/true blue ... if you are not fussy, it still look good... good and cheap.