Free shipping on all U.S. orders · Delivery details at checkout
30-day free returns · Full refund on unused items




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We proudly offer free shipping on all orders across the United States. Every item in our store is delivered with no additional shipping cost.
When you place an order, estimated delivery times are provided based on product availability and your location. Shipping details will be shown at checkout so you know exactly when to expect your pet essentials.
Please note that delivery times may vary depending on your region and carrier availability. While all orders ship free, we work with trusted logistics partners to ensure reliable and timely delivery for pet owners across the U.S.
30-day free returns. Return unused items in their original condition and packaging within 30 days of delivery for a full refund.
Return shipping is free. Email petlywox@gmail.com with your order number and we send you a prepaid return label. Damaged, defective or incorrect items are also returned free of charge.
Once your return is received and inspected, your refund is issued to the original payment method within 10 business days. Opened consumables, used grooming or hygiene items, custom products, sale items and gift cards are not returnable unless they arrived damaged, defective or incorrect. See our Refund Policy.
Please note that deliveries to certain remote or outlying areas may experience slight delays during busy periods or due to weather conditions. These delays are temporary and may vary depending on the location and carrier operations. We appreciate your understanding and patience.
Upgrade your aquarium filtration with XBBWMRS's 16-pack Large Filter Cartridges, designed for Whisper Bio-Bag Filters across IQ20/30/45/60 and PF20/30/40/60 series. Each cartridge measures about 6.22 inches by 4.72 inches, making them suitable for a wide range of tanks from 10 to 60 gallons. This compatibility and size flexibility help you tailor filtration to your setup without swapping equipment.
Inside, the cartridge combines a dense two-sided mesh with an activated carbon layer and a Zeo-lite deodorizing media. This 360° filtration approach aims to trap debris, absorb odors, and reduce discoloration, while keeping water clear for your aquatic inhabitants. The Zeo-lite component contributes to pH balance and helps minimize yellowing without altering essential water chemistry.
The new cartridge concept emphasizes simplicity: no messy assembly is required out of the box. An integrated 12-grid ABS frame distributes zeolite and activated carbon evenly along the inner surface so water passes through all media. The ABS edge is shaped for Whisper compatibility, offering a snug, durable fit that minimizes leakage from carbon dust.
To maintain optimal performance, consider replacing the cartridges every 2–4 weeks depending on tank load, feeding schedule, and water quality. Regular checks help confirm a good seal and consistent flow, ensuring the filtration system remains effective for your fish and plants.
Q: Are these cartridges compatible with Whisper Bio-Bag filters?
A: Yes. The XBBWMRS 16-pack is designed to fit Whisper Bio-Bag filters, including IQ20/30/45/60 and PF20/30/40/60 models.
Q: How often should I replace the cartridges for best results?
A: We recommend replacing every 2–4 weeks to maintain filtration efficiency and water clarity.
Full details: Shipping Policy · Refund Policy. Questions? Email petlywox@gmail.com.
Check the exact measurements and package contents before ordering. Read U.S. delivery details and return conditions. For a product question, email petlywox@gmail.com.
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