What a hoot! Cats like fresh water, so that fountain thingy is obviously quite attractive to him. You can get water dishes for cats that have a little recirculating pump, so it keeps the water moving and aerated. I'm thinking about getting one for Squeaker and Baby. I'm still missing Maia, I keep thinking I see her in her usual spots where she slept. :(
You will miss her for a long time, I'm sure, but after awhile, some of the ache will be replaced by happy memories.