What To Clean A Vacated Fish Tank With?

I was told by a friends that it's not a good idea to store an aquarium dry. Is that true? My friend said that if the aquarium was left dry for too long, the silicon seal would become dry too and crack which would make the aquarium leak.

I think it's a good idea to get another fish as soon as possible. That's the best way to get over the grief of the lost one. If you don't want another goldfish, how about an oscar? I had some before and they were very interesting.