Its not that any of us are scolding you, we are merely pointing out what a puffer as large as an MBU needs...
Also, when people say stuff like "i just feed mine krill" and keep him in a 55G with no mention of upgrading etc, people start to feel the need to point out even the most obvious of things, since a lot of people don't know that these fish will ultimately need tanks in the 800G+ range min once fully grown...