Heated Cat Houses for Outdoor Cats, Waterproof Insulated Cat House Outdoor, Warm & Durable Kitty Shelter for Community Feral Cats, Strays, Dogs, Small Animals, Easy to Assemble, 21.3x15x16.1 in, Green H' Habit Water Clarification: BioMax is a

Water Clarification: BioMax is a premium-grade biological filter media that provides superior filtration and helps reduce and control ammonia and nitrate levels for a healthy nitrogen level in the water

4L capacity≈ 16 cups

Automatic Design: Automatic water circulation system keeps water clean and oxygenated

Easy To Use: Roll over any surface

Heated Cat Houses for Outdoor Cats, Waterproof Insulated Cat House Outdoor, Warm & Durable Kitty Shelter for Community Feral Cats, Strays, Dogs, Small Animals, Easy to Assemble, 21.3x15x16.1 in, Green H' Habit Water Clarification: BioMax is aFeatures: COMFORTABLE HEATING DESIGN: Featuring a heating pad that warms to a cozy temperature above 20 when the cat is using the bed, this design allows you to effortlessly check on your little explorer while giving them a better view of their surroundings through the transparent door flap. Additionally, the waterproof heated cat house's door flap effectively shields strays from wind and rain, creating a warm and snug shelter outdoors WEATHER