Dwarf Rainbows and Glass Catfish?

[sleepyjoe]

Im upgrading from a 20g Long to a 37 gal long next week, I already have a healthy school of 7 Dwarf Rainbow Fish and 1 Rubber Lip Pleco in my 20, but I wanna get a small school of glass cats to go with my current group but I don't know If that would be too much for the tank or if they would be aggressive. Let's say 7 Rainbows and 5 Glass cats. (My tanks are fully planted and dual 50 gallon filters)

 

[Hellfishguy]

Dwarf Rainbows can be very rambunctious and would probably stress out the shyer catfish.