Yeah, I know...the guy who "invented" them lives in Houston and kindly offered me two to "test." I never got around to "testing" them, and decided I never would after hearing his "talk: at one of our club meetings. Wow.
i hope mantis shrimp eat nitrates. if they eat nitrates any where near as quickly as they eat hermit crabs and peppermint shrimp i will have a pristine nitrate free , hermit body part scattered mantis sanctuary of a tank.