There are plenty of threads asking for suggestions on what fish or inverts to get to control unwanted algae, but for those of us (like me) that want to keep attractive (and sometimes rare or expensive) macro algae in their DT, what fish and inverts have you found that are the safest to keep in your DT that won't make your macro algae into lunch? Alternately, what fish and inverts have you had eat macro algae in your display that you suggest avoiding? Are there fish or inverts that people say generally don't eat algae that you've been surprised to find munching your prized blue hypnea or dragon's breath?