I have a 125gal tank and i allways feed from the center never the sides and my Ps know when they are going to get feed b/c they will all come out of hiding when i open the center top then ill wave my hande in from of the tank to get there attention better or i know they will eat when they all swim in the front insted of the back where they usually are does anyone else have Ps that know what area on the tank the food comes from or do you mix it up and not feed the same place everytime?