The Octo FFF (Frozen Food Feeder) is a great acrylic innovation for feeding frozen foods to your reef! Just drop in your frozen food and watch your livestock feed! It measures 2" x 2" x 3" and is constructed from 1/4″ acrylic. It will hold on 1/2″ glass. Slots are 1/4″ wide. Depending on flow, the food will either fall through the middle divider and out through the bottom, or it will be blown out the side/front.