oyster feast has always been good to me. corals love it. rods food to me raise my po4 or it maybee was just being overfeed. oyster feast brought out polyp extension more in the long run. recently a freind told me to use the oyster feast first then the other food like rotifers and artic pods. the goal hear was to stimulate the feeding then feed. makes perfect sense to me. with a new job right now and existing another it has been hard to keep the tank consistant and it shows. soon my tank will be back on the game with great products like reef nutrition.
there are many snake oils out there in the hobby i have never used the bioplankton from liquid life so i can not compare, but i will say reef nutrition is not a snake oil by any means.