Im sure this is a frequently asked question and im sure many of you are tired of answering it but im going to ask anyhow. What does everyone use to heat these monster tanks and/or ponds. I am planning a build for this coming summer but want to figure out the cost before I get started so i dont get suck with no more money and only be half way done. So if anyone can help me out here and let me know how you heat your tanks and ponds.