About a month ago I bought a blue spotted watchmen goby. It disappeared within a couple days so I figured it was taken out by the flame angel. It wasn't looking good anyways because the flame angel was picking on it and I didn't have a sand bed at the time which I heard was required for these. Since it disappeared, I've sold my flame angel for $70, and used the money to buy a sanded. Earlier today I cleaned out the sponge in the overflow and saw something swimming around, then it hit me. This fish somehow managed to get on the back side of the overflow box and has survived in that small dark space for a while. Now it's back in the tank and it seems more at peace since the flame is gone. It's not eating though. What should I do?


