While we are on the subject of these excavators:
1) Is it ok to push the sand back into the hole, or level it back out? I know its not too good to stir up the botom, thats why I'm asking.
2) Does anyone else seem to have a problem feeding them without overfeeding the tank?
elaboration on question #2...It seems because this engineer hides all the time, the only way to make sure it is feeding is to overfeed the tank so food floats to the bottom for him to snatch. He is scared of his own shadow, I have to basically open his mouth and hand feed him. (not really, that would be easier if possible)