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I'm in the market for medium to large size dithers for a 75 gallon. Potentially a few tinfoil barbs or maybe even smaller Brycon sp.
I wouldn't go with tinfoils in a 75g unless thats a short term plan, I think they can get a foot or larger. I have filament barbs, which only get about 6-7", and I wouldn't keep them in anything smaller than a 6' tank due to their activity level. They're open water schoolers and are always on the move. Some of the smaller options like Matt or Blaise mentioned would be fine in a 75 though.
What fish are they dithers for?
Aren't giant danios awfully active for a 4' tank?
Gotcha. What about silver dollars? Not the flashiest, but the taller body makes them harder to snack on, and they seem to be pretty resilient, I have some in with younger red devils.Rainbows and giant danios would be snacks. I'm looking for something bigger.