The Python No Spill Clean and Fill. Try Drsfostersmith.com
always dechlorinate though.
With 10 gallon tanks, I'd just match the faucet temp with the tank temp, fill the tank then dump in the appropriate amount of water treatment for chlorine/chloramine. Unless you have super delicate species this is the best means. I have 7 tanks and use it on 5 of them.
The other two are delicate so I fill a brute brand 32 gallon trash can on wheels, heat it, mix in chemicals and salt mix is needed then put it in tank via a powerhead and a tube.