pjr, I grow my own so I usually just pour some into the tank directly from the 5 gall bottle. Or, when I target feed corals occasionally I mix some small chunked food (mysis, shrimp, krill, phyto flakes, etc) in a large shot glass then add phyto to that, wait for it to thaw and use syringe to suck it out. Adding phyto to the shot glass as I go along. I always turn off the skimmer for a day. I don't necessarily add phyto at night, anytime will do. What do you do?