I have 3 Black/White Skirt Tetras in 10gal. tank that is pretty squared away with set heater, Fluval filter. I've had 2 litters, by accident & I've cured the usual red irritations Tetras get.
My other tank is a 50gal. with 4 Common Goldfish ranging from 3" to 7", and a Spotted Pleco that is a...