So I succumbed to Petsmart's $1/gallon sale and got a new 40G tank today. Just couldn't resist the price, especially with the online discount. But it's labelled as a "Breeder tank". Why? I don't have any plans to use it as a breeder tank. As far as I can tell, it's just the same as my 20G High, just twice as long. Is there any reason I can't just use it as an upgrade for my 20G H to increase my stocking options? Or start a new cichlid tank, which I've also been contemplating. Am I missing something?