Best Heater For 10 Gallon?

[rpgmomma8404]

We be poor people so I've been looking on amazon for a heater for me and my son's 10 gallon. Any suggestions? If it can stick under $20, I'll be happy. I would like to see what other people would suggest before I add one to my wish list. 

 

[TaurineLittle]

Hi there, for a 10gallon/50litre tank a 50w heater would be more than enough and you can pick those up off eBay for $5.