Fluval 306 and inlne heater?

You'll probably have to change from the ribbed fluval tubing to regular 5/8" clear plastic home depot/lowes tubing. Then you can get a hydor inline, I don't know if there are any other inline heaters commonly available.

That's what I did with my fluval 206. I think it did slow down the flow a little.

Thanks guys I'll do that