SFE's are hard to feed at the beginning. Soak their food in garlic and they will take to it.
They create a big bioload on the tank so you might want to factor that in before you get one. My baby was almost 21 inches.
They do not eat daily, so feed them every couple of days. They are known to go on hunger strikes for up to a month so if he does, don't worry to much about it. He will eat eventually.
Snowflakes are nocturnal so feed them at night. They basically will hang out with the head above the substrate or rock, but the rest of the body will be hidden. This is normal behavior.
Do not put a SFE in a tank with fish that are smaller than their mouth or they will become a meal. Shrimp are another one that can be potential food sources for them.
They have a lot of personality and you really need to have your top covered well as they will slide out of the tank and go to the floor.
Case and point. One morning I woke up and was walking into my bedroom bathroom and saw something that I could have sworn was an 'accident' of my dog's. The problem was my dog was standing by it and staring at it. This is not normal for my dog. The rare occasions that she has had an accident she hides.
I looked again and saw my SFE curled up on the floor. Needless to say I grabbed him and followed the 'throw them in unless they are crispy' rule and he was fine after I got him back in the tank.
Hope this information helps you.
Denise M.