Good reef macro lens for Rebel EOS cameras?

[Aquattro]

Thanks Franklin. I think there are still some things that can improve one's abilities with entry level gear, such as tricks over/under exposing, etc. Adam posted some nice pics with just an extension tube, which albeit is still a step or three below a good macro lens, but as with reefing, sometimes we can work around the requirement for high end gear to accomplish the same task. At least I hope so, since after all my reef purchases in the last month, there is no way I can afford a new lens