Just go 40 breeder with some dithers, you will get much better behaviors and color out of the salvini that way.
×2Silver dollars are way too "darty" to be kept in short tank like a 40 gallon.
I've only ever kept silver dollars in a 55 and I felt it was too small for them. And they weren't even adults yet. I had them 6-8 months. All they did was bang into everything in the tank and more times than not they'd try to get through the glass.Lol What size tank minimum for "darty" dithers in your opinion and why?