i have a bowfront 46gal with guppies and cherries all but the tinyist shrimp are all out every day,... and i just sold over 1000 shrimp and still have more so no problem there the shrimp don't care and the guppies know they cant eat them, except newborns and they can't catch them so they don't try anymore, but the babies tiny as they are tri to eat half grown shrimp cause they don't know anybetter but they pick once or twice and then leave.... so it works out good..