Created from volcanic rock, the microbes spores germinate when natural waste exists in h2o, breaking down the waste and creating a healthful environment. Nitrates are Obviously eradicated by plant absorption, in addition to by microbes residing in gravel which convert nitrates into nitrogen gas which then evaporates with the tank. https://socialmediaentry.com/story3518986/helping-the-others-realize-the-advantages-of-rare-fish