I ran the Zeovit system for years. Moved across country and started my present tank almost two years ago. Ran this one on the Aquaforest System. Tank did well until the last month or so and then my nutrients began to rise. Switched back to my "roots" and started the Zeovit system. Things were back in line in a very short period of time. The fact that you don't need to run any type of GFO with Zeovit is what I love most, only a Zeo Reactor that you pump once daily. The system just works, all based on their bacteria. Here's a link to all of the info you need: https://www.korallen-zucht.de/en/Download-Center/