Thanks for saying this, as its not said often enough. It is far more of a truth in SW tanks.The biggest mistake people make with smaller tanks is overstocking and then the maintenance becomes impossible and all the overfiltration in the world will not make your fish stay healthy.
Thanks for some clarification on this. I didnt realize they really do need that much room as I have seen them pretty commonly in 10 gallons when smaller and in 20 gallon longs when larger and they seemed to be doing well enough. Just becuase its been done doesnt necessarily make it right. But I can certianly imagine that something bigger with a bit of a "hunting territory" would be a much welcomed and more comfortable habitat.Peacocks really do need the space after a while though. Something smaller than a 30g is fine while they're still growing, and I know it sounds silly that a "shrimp" needs 30g of water to be happy, but they really do move around a lot and like to hunt for their prey.