Slightly off topic but what are your thoughts on your current fish list? Regal tangs are known to eat zoas, not to mention your running a 33g with four of them. These fish require much more space and will promptly add to your bio load. Frag tanks are kept rather fish free to ensure low nutrients for maximum growth, clownfish and anthias serve no purpose in this tank and will muck it up quite quickly with the required feedings.
Ditch all of that, pick up a lawn mower blenny and some snails then your rocking.
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