Hydr Replacement Filters
A five pack of carbon filters that keep the Hydr fountain water clean.
Final/Total cost shown at checkout
Fresh water needs a fresh filter. This five pack keeps the Hydr fountain running clean, with activated carbon that traps hair and debris and keeps the water tasting the way your cat likes it.
Swap one in about every four weeks to keep the flow clear and the fountain healthy.
Designed in the Netherlands
Hoopo is a Dutch studio founded by Marcus with a simple mission: make cat things that are good for the cat and easy on the eye. Nothing here is a mass import. Hoopo develops every piece itself, alongside designers, cat behavior specialists, and cat nutrition experts, shaping each detail around how cats actually drink, step, and scratch.
Made to last, made responsibly
Where it can, Hoopo builds from recycled or plant based materials: recycled ABS on the hooded boxes, stainless steel on the open ones, pine and thick sisal on the scratchers, and a plant based tofu litter that composts. The Tofu litter was named an award winning cat litter brand in 2025.
A fountain is only as clean as its filter, so keeping spares on hand is the difference between fresh water and a fountain nobody uses.
- Activated carbon filtration
- Catches hair, grit, and food bits
- Keeps water tasting fresh
- Swap about every four weeks
Shipping and returns
Shipping is calculated at checkout. Delivery usually takes 7 to 10 days.Returns are accepted within 15 days of delivery. Please contact us first before returning anything so we can help.