Dosing pumps and Auto Top Off (ATO) pumps are easy ways to keep up with the maintenance of your saltwater aquarium. Dosing pumps offer a controlled way to add solutions to your tank at a consistent rate. We offer a variety of options – pumps with their own timers/controllers, variety of different speed pumps and various mounting options like brackets and shelves. Top off pumps are a great way to keep your water level constant. We offer ATO pumps from Tunze, JBJ, Spectrapure, Aqua Lifter.