I just bought a "plankton light reactor" by aqualine from Foster and Smith (on sale). I realize that this setup can be done much cheaper with Coke bottles, however this unit is a little easier to use, and is very well made (I might add). In any case, I plan to use either DT's as the inoculant, or the disk of N. oculata that I got from Florida Aqua Farms. If I add 1 litre of plankton every couple of days to my heavily stocked 600 gallon system, am I at risk for overfeeding the tank? Does the fertilizer which is added to the plankton culture get into the tank with the plankton themselves, or is it all sucked up into the plankton very quickly? My tank is very well skimmed and all nutrient levels are very low at this time. Has anyone noticed any difference in coral health, or sponges, clams etc. I understand that clams in farms are fed a different species of plankton.