Marineland Penguin Power Filter Cartridges – Rite-Size A, B, C (Replacement Cartridges)

The Marineland Rite-Size Cartridges are the official replacement cartridges for Penguin Bio-Wheel Power Filters. Each cartridge combines two essential functions:

• Mechanical filtration – a dense floss pad that traps debris, waste, and uneaten food.

• Chemical filtration – activated carbon that removes odors, discoloration, and impurities from the water.

They are pre-assembled and ready to use, sliding easily into your Penguin filter for quick, mess-free replacement.

Marineland uses a Rite-Size system to make choosing the correct cartridge simple:

• Rite-Size A – fits smaller Penguin filters (typically up to 10 gallons).

• Rite-Size B – fits medium Penguin filters (commonly 10–20 gallons).

• Rite-Size C – fits larger Penguin filters (generally 20–50 gallons).

Most aquarists replace cartridges every 2–4 weeks, depending on tank size and fish load. Having a multi-pack on hand ensures your filter continues to run efficiently without interruption.

👉 In short: Marineland Rite-Size Cartridges keep your Penguin filter working at its best by combining mechanical and chemical filtration, with simple sizing (A, B, C) to match your aquarium.