Most disappointing Livestock Purchase?

[Aquaria]

my worst purcheus was a when i first started in the hobby i thought my 6m old tank had enough pods to support a red manderian you get the idea needless to say i vowed to never get another one unless its eating frozen already AND as for gsp I LOVE THEM awsome looking coral +7 or w/e on an island type rock keep it isolated or you will regret getting them