I used Kent before I found DT's. I don't have anything bad to say about it, but I did notice my corals really began to inflate more when I switched to DT's. Also my elegance began to turn even more green when I started using DT's, and really most all my corals got a green color to them. I did have a small algae outbreaks when I was using Kent, but I can't say it caused it. If you want a link to a vendor e-mail me.