Darlly Spa Replacement Filter Cartridge 35 Sq Ft 2 Inch Twist Lock FC3058 C7335 70354 Unicel

The Darlly Spa/Pool Replacement Filter Cartridge — Spa Berry (35 sq ft) is your reliable cross-reference for a crystal-clear spa or small pool. Directly replacing Filbur FC-3058 and Unicel 70354, this cartridge is designed to drop into standard filter housings without guesswork, so you can get back to enjoying pristine water faster.

• Filtration area: 35 sq ft of media to capture fine sediment, oils, and debris for noticeably clearer water.
• Bottom design: 2" bottom with an open, twist-lock connection for quick, secure installation and easy removal.
• Top design: Closed Castle top provides a robust seal to minimize bypass and maintain pump efficiency.
• Dimensions: 7-1/8" diameter and 5-7/8" length, fitting common spa and small pool filter housings.
• Media weight: 3 oz of filtration media engineered to balance flow and filtration performance.
• Model note: Spa Berry variant—optimized for compatibility with standard spa filtration systems.
• Cross-compatibility: A convenient replacement for Filbur FC-3058 and Unicel 70354, helping you maintain parts you already know and trust.

Why this cartridge matters in everyday use. The combination of a generous 35 sq ft filtration surface with a compact 7-1/8" diameter means strong filtration without sacrificing flow. The open bottom with twist-lock makes alignment and replacement straightforward, so you spend less time fiddling with the cartridge and more time enjoying clean, inviting water. The castle-top seal helps prevent bypass, leading to more consistent sanitizer efficiency and fewer cloudy days between cleanings.

Ideal for: spa enthusiasts and small-pool owners who want a dependable, cross-compatible replacement that fits their existing housing and avoids unnecessary downtime. It’s a practical upgrade when migrating from FC-3058 or 70354, delivering familiar performance with a straightforward install.

Helpful tips for best results: - Rinse the cartridge under clean water after heavy use to dislodge trapped debris and maintain optimal flow. - Inspect the O-ring and housing gasket regularly; replace damaged seals to prevent bypass. - Replace the cartridge on a routine schedule (based on usage) to sustain water clarity and system efficiency—commonly every 6–12 months for residential spa setups, or sooner with heavy or chlorinated usage. - Pre-wet a new cartridge before first operation to reduce initial dry-start strain on your pump and ensure even wetting of the media.