Yea, I've never seen one personally I don't think. The fish would probably have to be small enough to fit in its mouth. I would say - if the head fits, the fish fits. Shouldn't be a problem with the size of that particular wasp fish. I also may add that I never really trusted a float switch for the fact it is a moving part and could always choose to seize up and pump all if the ATO water in at once or the opposite. There are many reliable ATOs on the market now though.Everything I looked up said they do fine in a smaller reef as they are very docile. Said they can eat smaller inverts but they have to be pretty tiny to fit in it's mouth but I'm not sure. That's if I can even find one for sale, apparently they aren't very common. So I'm trying to decide between smart ATO and tunze nano. Tunze is cheaper but I've had one burn up on my before so idk. Maybe I will go with the smart ATO, thanks for the info!

