Well I have been reading up on Prodibio biodegest, bioptim and reef booster and it doesn't seem that too many reefers are using this method anymore. I have made the plunge and bought 6 month supply of all three and gonna give it a shot and see how my tank responds to it. Are there any downfalls to prodibio products compared to Zeovit or other means of Carbon dosing? After reading that it is a very successful product why are there so few of users out there talking about it?