Dory is a great cleaner for you Whoyah, but she does it totally different than the lawnmower. We are so impressed with our Grumpy, we don't know if any other could replace him. Like Jason said:We can't agree more, except we think it looks like he's been practicing kissing the mirror like young kids do before that first kiss! Every now and then we get graced with kiss marks on the front of the glass. You almost hate to magnet them off! He eats constantly and has a tummy to prove it and make you proud of him! He's so social that he will come show you when he's stuffed full too! :clapyell:It's kinda cool to see where they've eaten off the glass when you let the algae film grow a bit... looks like little puckered lips.