Nope totally wrong, With some fish like my peacock cichlids, length of the tank is what’s important and a 55 is way better for them than a 40b, try putting 25 peacocks in a 40b and see how it works out. Smh
You have 25 cichlids in a 55 gallon? sigh * Obviously 25 cichilds wouldnt work in a 40B thats not the point.