Originally Posted by
tropills
Good Question, I would like to think that it is pulling more good food for itself from the cleaner water( but if it has a craving for poop it could just go to the bottom.)
Know but seriusly they will sift the sand when they feel they are'nt getting enough nutrients from the water itself.
or at least thats what I've read in several books.
Nope, there are major morphological differences in the tentacles. One is adapted to filter feed, one is adapted to sift sand. They dont really switch sides. If a filter feeder, it must get food from the water and you should be adding food. If it has gotten any smaller than when you got it, it is starving.
Sand sifters need to have access to sand.
I suppose they might get a bit from one or the other, but really, if it can't use its primary mode of feeding, it is in trouble.