I have heard that snowflakes and a couple other eels can be reef safe...is this true? My wife is dying to get an eel for our tank but its already in the works of becoming a reef tank, has anyone ever kept an eel in a reef tank?
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Garden eels need a DSB. Atleast 6 inches deep. Tricky to pull off, especially in a smaller tank. Morays are (usually) your best bet.
This is actually a pretty common misconception. Their bodies are quite flexible. I have seen them successfully kept in a tank with 1.5-2" depth. They just keep the buried portion of their body horizontal. The biggest issue with garden eels is they extremely timid and will not leave their burrow for food, so they dont like active tankmates and tanks need to be overfed.