Rite-Size B Filter Cartridges Compatible with Penguin Power Filters

In this review the Umlecoa Rite-Size B replacement filter cartridges are assessed for hobbyists who run MarineLand Penguin and Penguin PRO power filters and want a lower-cost alternative to factory replacement cartridges. The bottom line: these cartridges deliver straightforward mechanical and chemical filtration with easy installation and broad compatibility, making them a sensible pick for routine maintenance cycles. They are best suited to owners who replace cartridges every 2-4 weeks and value fit and value over boutique materials or premium branding.

Key Features

• Strong Compatibility: Designed to fit MarineLand Penguin PRO Power Filters 100, 125 and 175 and the original Penguin Power Filter 150, so swapping is simple and predictable.
• Triple Filtration Media: Each cartridge combines filter cotton, a layer of activated carbon and a structural plastic plate to provide mechanical removal of debris plus chemical polishing.
• Quick Installation: Rinsing under cool water and aligning the bottom key slot lets the cartridge seat cleanly into the filter chamber for fast replacement.
• Replacement Guidance: The manufacturer recommends replacing cartridges approximately every 2-4 weeks, based on testing that shows cotton can become saturated within that timeframe.
• Value and Support: Packs come at a lower cost than many OEM options and the seller offers prompt customer service with refund or replacement within 24 hours if compatibility issues occur.

Who It's For

This product is for freshwater and marine aquarium owners who use MarineLand Penguin or Penguin PRO external hang-on-back style power filters and want a cost-effective, ready-to-use replacement cartridge. It is particularly useful for busy hobbyists who prefer quick swaps and routine 2-4 week maintenance without extra assembly.

Those who should look elsewhere include aquarists seeking premium multi-stage canister-level filtration, very fine micron mechanical media, or specialty chemical media beyond standard coconut shell activated carbon. If maximum longevity between changes is a priority, consider higher-capacity media options.

Pros & Cons

Pros

• Good fit with Marineland Penguin PRO and original Penguin filter models, reducing installation fuss.
• Combined cotton and coconut shell activated carbon gives both debris removal and chemical polishing.
• Budget-friendly pack pricing compared to many branded replacements.
• Seller support promises prompt refund or replacement if an issue arises.

Cons

• Some customers report mixed impressions of material quality and occasional cloudiness; the filter cotton will need replacing every 2-4 weeks.
• Not designed as a long-life or specialty media solution for heavily stocked or very dirty tanks.

Specifications

Our Verdict

The Umlecoa Rite-Size B cartridges are a practical, cost-conscious choice for owners of MarineLand Penguin and Penguin PRO filters who want reliable basic filtration and fast swaps. They deliver expected mechanical and chemical polishing in a ready-to-use form, and provide good value when replaced on the suggested 2-4 week schedule; choose them when fit and routine performance matter more than premium media longevity.

Frequently Asked Questions

Will these fit my Penguin PRO 125?
Yes, these Rite-Size B cartridges are compatible with Penguin PRO models 100, 125 and 175 as well as the original Penguin 150.

How often should I change the cartridges?
Manufacturer testing suggests the filter cotton becomes saturated within four weeks, so replacement about every 2-4 weeks is recommended for optimum performance.

Do they include activated carbon?
Yes, the cartridges use coconut shell activated carbon along with filter cotton and a plastic plate for triple filtration.