I don't know about clean
; my tanks are rarely clean LOL, but it's definitely energetic and fun to watch. Best part is when the male mollies extend their sailfins all the way and do silly courtship dances. They look utterly ridiculous, but I guess the girly mollies like it, because we've got a gazillion mini-mollies.
I'll see if I can get Slim to cooperate for another photoshoot sometime. Probably I'll have to bait him with something yummy and get someone else to snap the photo while his attention is elsewhere.
As for the algae... truthfully, I'd rather let it bind up any excess nutrients in the tank into a stringy form that I can grab handfuls of and yank out of the tank. But it's definitely not very attractive. :P So if I could get something to eat the algae, it'd probably look a lot better.