What? why? I was considering them. are they that bad?
While they are cool to watch in their schooling behavior, they also can be skittish and dart everywhere when they spook. They are very aggressive feeders with me getting soaked since I could not close the lid fast enough to not get drenched by their speed of feeding. They also add to the bio load.
They can be 'stupid'... I really cant find another word to use here. Watching a SD get 'stuck' in a corner of the tank and freaking out is kind of funny, yet sad.
Who knows, now with the 8ft tank it might have been better but in a 6ft (210g) tank it was way too much.