I have been thinking recently, as I have from time to time over the years, about how to maintain significant planktonic life (both phyto- and zoo-) in my tanks. What I repeatedly come down to is that the conditions that we maintain in our tanks to keep various livestock does not match the conditions needed to maintain planktonic life. It seems that the natural tendency of our systems is to consume available nutrients, including plankton over time which results in low nutrients and bio-diversity....