Flexpure Biofilter Bricks

Flexpure Biofilter Bricks (1 Liter)

Flexible biological filter media for freshwater and saltwater filtration.

Flexpure is biological media, not mechanical media. It is designed to provide high surface area for beneficial bacteria while allowing unrestricted water flow. It is not meant to trap debris or polish water.

Each box includes one 4″ × 4″ × 4″ brick (approximately 1 liter total volume), factory cut into two 4″ × 4″ × 2″ halves for flexible placement in a wide range of filtration systems.

The open pore structure supports dense bacterial colonization while remaining fully reusable. Unlike ceramic media, Flexpure does not crumble, shed dust, or restrict flow as it ages. It can be rinsed and gently squeezed during maintenance without breaking down.

Why Flexpure

• Shapeable biological media that can be cut or stacked to fit different filter layouts
• Rinse and gently squeeze during maintenance without loss of structure
• Open pore design maintains flow and resists clogging
• Durable and dust free with no ceramic fragments
• Safe for freshwater and saltwater aquariums

Specifications

• Total volume: approximately 1 liter
• Original brick size: 4″ × 4″ × 4″
• Includes two pre cut halves, each 4″ × 4″ × 2″
• High surface area open pore structure
• Freshwater and saltwater compatible

How to Use

Flexpure works best in free flowing, oxygen rich water where it can function purely as biological media.

Place loosely in sump chambers, media baskets, or open filter compartments. In sump systems, Flexpure may float, flip, or gently tumble with water movement, exposing the entire surface area to circulation.

In canister filters, place Flexpure after mechanical filtration, such as a pre filter sponge or floss, to prevent detritus buildup and keep it functioning as biological media.

For maintenance, remove and gently squeeze in dechlorinated water during water changes. Flexpure is designed for long term reuse without collapsing, clogging, or shedding material.

Flexpure’s role is biological stability through high surface area and unrestricted flow, not debris capture.