thx for the replies. although I don't think whistling will help either
I knew these guys were smart, but man, their strength surprised me.
He lives in a cylindrical tank (sorry, don't have pics of the tank) which is about 2m (about 7 ft) high. windows are cleaned with a sponge on a telescopic stick. but flubber has to be distracted with food or another toy, or he'll just grab the stick and try to pull it out of your hands.
first time you experience this, he succeeds at this too!!! second time you're more cautious, trust me.