So I went out today and bought a 3-gallon tank (upgrade from the 1 gallon), a thermometer, heater, water test-kit, and filter for my betta, Merlin, and right now he's sitting in the cup I bought him in as he adjusts to the temperature of his tank. I'm hoping the filter/air bubbler (bubbler came with the tank) doesn't push him around (luckily, I can turn off the bubbler if that is too much water flow). But I can already tell he's excited about his new tank. He absolutely hates when I clean his entire tank and got agitated when I put him in his little cup to just clean his one gallon, so I know he'll be happy in the three gallon.
Just thought I'd post this in here since I really didn't know where else it would go! I'll try to post pics of Merlin in his new tank once he's swimming around!