I think ck look very nice and roomy!! I need to get out and find one. I am not supporting my PetsUnlimited bc of the way they run their "business". Workers standing around while adult syrian hamsters attack each other, no water/food etc... And the PetSmart are currently out. I think I'll call them ^^
Which is the best size for a betta tank?? Whoever mentioned the large ones don't hold their weight in water, can you provide a link?? It would be an awful shame to have one break on an unsuspecting, but well meaning, buyer!! (And as I'm in the market, I'd really like to know!)
Some people have reported having problems with it, I haven't had any issues, and it's relatively small. It keeps my tank at 78*. It's not adjustable but I think in a small tank it does the trick. Make sure you get a small thermometer (the ones that float or suction to the inside of the tank are best and cheap, like 2.50) so that you can monitor it and see at a glance if it stops working or malfunctions. You may be able to find a few options at your local pet store in that range. Just make sure it's rated for the size of tank you get.
Oh and btw, for a rough estimate of how much water your rectangular or square tank can hold take L*W*H and divide by 231.
I ordered this one :http://www.petsmart.com/product/inde...=Aquarium+Size which is in the mail coming to me bc NO stores sell it locally. People here seem to like it but many other feel the ones that are not adjustable can be a nuisance! This small betta therm one only heats the water a couple degrees above room temperature so you'll need a thermometr and a stable room temp!