phytoplankton culture

[regmes]

Does anyone have any idea why my phyto culture does'nt seem to be growing? I made the pop bottle set up with air bubbling through acrilic tubes preped water at 1.019 sal. mixed .5 cup of Phyto Feast phytoplankton, 1ml of Kent additive and 5ml of miracle grow. Just like the reciepy I've read about online, and it's been 1 week now and I have not seen any difference in the color or consistency.