i know it's not a common word in the aquarium hobby but what are the neggatives to having a undercrowded tank. Iam planning on buying a 55+ gallon tank. Do small schooling fish fell scared if the tank is too large, even if they are in a large school, say 28 white clouds. This would be just to start of course. i dont want to fill the aquarium with more fish (especially expensive ones) untill it is established and stable.