i have a 3 gallon tank thats empty... plastic tank so its gonna be cold... has a light but i donno how warm that will keep it... i need somethin cheap and ok in cold water... any ideas? im not puttin a betta in cause its too cold for them... at least i think 
any other ideas... im open to absolutely anything thats cheap and cool lol

any other ideas... im open to absolutely anything thats cheap and cool lol