Kent Marine Phosphate Sponge for Aquariums

Made from the same super-durable, puncture-resistant, non-toxic rubber as classic Kong toys, this versatile, bone-shaped chew is just the thing for the home-alone dog. The innovative design features holes with patented Goodie Grippers on each end. Stuff the holes with biscuits, dry foods, or Kong brand Stuff ‘n pastes or treats, and watch your dog go to work extracting the contents.

An easy way to gauge Aquarium salinity at a glance. Designed to give temperature-corrected readings in warm water aquariums. Its precision and compact design provides accurate readings that aquarists of any level can understand.