Tuffy Ultimate Bone Durable Dog Toy Red Paw 13in Ear-Eye Pro-REEF has a lower alkalinity:

Pro-REEF has a lower alkalinity: 6

the Chuckit

30 x 18 Hinged Glass Canopy Hinged Glass Canopies allow the maximum amount of light to pass into the tank

Washes awat dirt and wax painlessly without the use of swabs

Wide mouth-nozzle increases surface coverage by about 20% enabling faster

Tuffy Ultimate Bone Durable Dog Toy Red Paw 13in Ear-Eye Pro-REEF has a lower alkalinity:TUFFY dog toys are durable, soft dog toys made with multiple layers of material and sewn with multiply rows of stitching. Seams are reinforced with an additional layer of material on the outside of the toy, and the outside Fleece is cross stitched for added durability. Internal squeaker is sewn into a safety pocket for added safety. Machine washable and it floats!