IMO if you dont have a sandsifting goby for your SB then you will never have a well sifted and crisp SB.They can cause rock slides and do cover coral but like my clam and plate they just remove.
This guys Sb cleaning performance outwieghs any faults
Though a 50 gallon is a little small but my daimond eats frozen , pellet and flake so he wont starve.
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Lance H.
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