Just got my new elong on Wednesday and it has been 4 days now, and he has not eaten. He has been hiding in the same corner behind all the rocks and plants the whole time. The temp is at 81-82 degrees if that makes a difference. I have tried to feed him small feeder fish, he is about 6 inches long, but he does not even go for them. He is starting to get his black mask though, which must be a good thing. Is him not eating and hiding all day something too worry about?