About This

• 【Highly Compatible】: 10-pack aquarium filter cartridges designed as Rite-Size C replacements for Marineland Penguin PRO 275/375 and Original Penguin 200/350 power filters. Ideal for multi-tank households and frequent water changes — one box lasts 3-6 months, delivering a cost-effective filtration solution for 30-75 gallon tanks.
• 【Ready to Install】: Ready to install with no cutting or assembly required. ① Rinse cartridge under cool water to remove carbon dust. ② Align bottom key slot and insert firmly into filter chamber — fits securely in 30 seconds. Say goodbye to messy carbon leakage with pre-encapsulated filter material.
• 【Superior Filter Performance】: 3-stage aquarium filter cartridge: ① High-density cotton layer captures debris and fine particles. ② Coconut shell activated carbon removes odors and discoloration for crystal clear water. ③ Zeolite crystals help maintain stable pH for healthier aquatic life.
• 【Warm Tip】: For optimal water quality, replace every 2-4 weeks. Performance testing confirms peak filtration lasts up to 4 weeks — schedule regular changes to keep your aquarium water clean and your fish thriving.
• 【Friendly Service】: Backed by a 2-year warranty. If any issue arises with your aquarium replacement filter cartridges, contact us for a hassle-free solution — your satisfaction and your tank's health are our priority.