Update: Well, about half the tadpoles seemed to have died overnight. We’re not sure exactly why, maybe overcrowding, maybe not enough oxygen, maybe they were already on their way out before we relocated them… but we’ve cleaned out the little ‘pond’ and moved it to a new location and filled it with fresh water again. Today John’s going to pick up some fish food, and we also have this little water recirculator that John had from his old fish tank days that we’re going to rig up somehow.