Suggest an RO/DI

Ha! My Tangs would hunt me down in the dark and use their surgeon abilities on me if I got rid of all the algae. I think some is good. Too much .. Not good looking.
 
Not of my fish are big microalgae eaters. If this Ro/Di doesn't help, Im out of ideas.
 
Get a Tang? Mine eat a ton a day. They are always bulging from it and don't bother with dry food.

Whoops 36gal? Never mind.
 
I would need something that eats cyano, which I don't know of besides some snails and hermits.
 
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