Thanks everyone!

Robin - I have a 5 gallon aquarium for Tank and his tankmates, but these two guys are each in one gallon tanks with a small filter mounted on the inside.

Simon isn't doing too good. I think the current from the filter is stressing him out, so I only leave it on for a short while each day. Hopefully he'll get used to it. Theo is doing great though.

Aly - I swear, I didn't even realise those were the names of The Chipmonks. I haven't ever liked them.

And Cinny's left them completely alone after I told her once that they were a no-no.