Kolar Labs Metabolix Aquarium Bio-Pellets, 600g PHA Nitrate & Phosphate Media

Kolar Labs Metabolix Bio-Pellets are corn-based PHA filtration media designed to reduce nitrate and phosphate in freshwater and saltwater aquariums.

• 100% PHA resin made from corn, with no fillers — a clearly defined pellet composition.
• Solid carbon dosing helps reduce nitrate and phosphate — supports cleaner, clearer aquarium water.
• Uniform, round pellets — designed for smooth fluidization with minimal floating or clumping.
• For freshwater and saltwater aquariums, filter bags, and media reactors — offers several application options.
• Made in the USA by Kolar Labs — aquarium filtration media from the manufacturer.

Managing nitrate and phosphate is part of keeping aquarium water clean and clear. Metabolix Bio-Pellets are made for aquarists who want a solid carbon-dosing media for aquarium filtration, with a format that can be used in different aquarium setups. Their intended role is to help reduce both nutrients in fresh or salt water; the pellets are also stated to be safe for fish and corals.

What do Metabolix Bio-Pellets do in an aquarium?

They use solid carbon dosing to help reduce nitrate and phosphate. These are the two water nutrients the pellets are designed to target, making them a filtration-media option for aquarists working to keep aquarium water clean and clear. The product is intended for aquarium use rather than as a general-purpose water treatment.

• Targets nitrate and phosphate.
• Uses solid pellets as the carbon-dosing format.

What are the pellets made of, and how are they shaped?

Each pellet is made from 100% PHA resin derived from corn, with no fillers. Kolar Labs uses a uniform size and round shape to support smooth fluidization and minimize floating or clumping. This makes pellet shape and consistency relevant when choosing media for a fluidized setup.

• Resin: PHA made from corn.
• Pellet form: uniform size and round shape.

Which aquariums and filtration setups can use them?

Metabolix Bio-Pellets are suitable for freshwater and saltwater aquariums and can be used in filter bags or a fluidized media reactor. A fluidized media reactor is the recommended application. The pellets are safe for all fish and corals, so their stated aquarium compatibility includes both fish and coral systems.

• Application options: filter bags or a media reactor.
• Designed for fresh and salt water.
• Safe for fish and corals.

At 600 g (1.32 lb), Kolar Labs Metabolix Bio-Pellets suit aquarists seeking a corn-derived PHA media for solid carbon dosing in freshwater or saltwater filtration. Their uniform, round form is designed for smooth fluidization with minimal floating or clumping, and they are made in the USA.