Courtesy of Mel (thanks!!
) I now have a nice new home for the next nice little betta boy that takes my fancy - think I'll go betta shopping this w/e WHOOP!! 
But first I do have a couple of questions - I've not kept a betta in an unfiltered tank but, seeing as it's going to be just him (and maybe some shimps or snails) I don't think I'm going to filter this one. Is it ok to do that?? But also I'm a bit confused - if i don't have a filter, how do I cycle the tank? Or do i not?
and also, I know in an unfiltered tank you're supposed to do 100% wter changes but I was wondering if a 50% water change twice a week (as opposed to 100% once a week) would have the same effect? Would it be any worse for the betta than one big weekly 100% water change??
Thanks
But first I do have a couple of questions - I've not kept a betta in an unfiltered tank but, seeing as it's going to be just him (and maybe some shimps or snails) I don't think I'm going to filter this one. Is it ok to do that?? But also I'm a bit confused - if i don't have a filter, how do I cycle the tank? Or do i not?
and also, I know in an unfiltered tank you're supposed to do 100% wter changes but I was wondering if a 50% water change twice a week (as opposed to 100% once a week) would have the same effect? Would it be any worse for the betta than one big weekly 100% water change??
Thanks

I put him on reserve today while I set the tank up!! H'es beautiful! I'm so chuffed because I've never seen a crowntail in stores round here and I just nipped into the new one that opened today (I met the guy who was opening it last week and he said to pop in today and be the first to see the new fish!) and fell in love with him (the fish not the shop owner, obviously). I'l try to post some pics when he's settled!