Cleanup Crew - Ottos or Corys?? or something else?

Well, ghost shrimp are very cheap (I get six for a dollar), so you might just try your luck ;). They have hardly any biomass, so six might be okay. They are quite short-lived, though.

Amano shrimp live much longer, but are more expensive. I didn't find them difficult, either. I haven't lost any yet.
 
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