fishing port Ultra Fine Filter Basket for Dolphin robotic pool cleaners — Part 9991458-R1, washable ABS frame, fine mesh

Fishing Port Ultra Fine Filter Basket (Part 9991458-R1) is a heavy-duty replacement filter cartridge designed to capture fine debris—hair, sand, leaves, and dust—for compatible Dolphin robotic pool cleaners.

If your Dolphin robotic pool cleaner has been leaving behind fine sediments or you want a longer-lasting, washable filter option, this Fishing Port fine filter basket offers a direct-replacement design for many Dolphin models. Built from durable ABS plastic with a fine fabric mesh, it increases particle capture without restricting flow, and it’s straightforward to remove, rinse, and reuse season after season.

Which Dolphin models will this filter basket work with?

This filter cartridge matches a wide selection of Dolphin cleaners. Before ordering, double-check your cleaner’s part number or model name to ensure compatibility.

• Compatible models include Active 20, Active 30/30i/40/60 and Advantage Ultra
• Includes Discovery (new), Explorer E30/E50 and M600
• Also fits Mercury, Premium, Proteus DX5i, Quantum, S200/S400, T45/T55i
• Works with Warrior SE/SI and Prowler 920/930/930W

How does the ultra-fine fabric improve pool cleaning?

The finer mesh traps much smaller particles than standard cartridges, which reduces cloudy water and keeps filtration systems from clogging as quickly. The design balances fine capture with sufficient water flow so the robot maintains suction and movement.

• Captures hair, dust, sand, and fine organic debris
• Reduces the amount of micro-debris sent to pool filters
• Maintains proper water flow for consistent cleaning cycles

What materials and build quality can I expect?

The Fishing Port filter combines a heavy-duty ABS frame with a tightly woven filter fabric engineered for repeated cleaning. The robust frame resists cracking and the fabric withstands rinsing, giving the cartridge a useful life of multiple seasons when cared for properly.

• Durable ABS plastic frame for long service life
• Fine synthetic mesh for efficient particle capture
• Easy to rinse and reuse — typically lasts 2–3 years

How do I install and maintain this replacement filter?

Installation is quick: remove the old cartridge from your Dolphin unit and snap this part into place. For maintenance, rinse after each use and deep-clean periodically to avoid buildup; replace when the mesh shows wear or damage.

• Snap-in replacement — no tools required for most models
• Rinse with garden hose after every cleaning cycle
• Inspect periodically and replace if fabric tears or frame cracks

Who this is for: Pool owners and maintenance professionals who use compatible Dolphin robotic cleaners and want a cost-effective, reusable filter that captures finer debris than standard cartridges. Ideal for homes with trees, pets, sandy environments, or frequent swimmers who generate hair and skin cells—anyone looking to reduce micro-debris buildup and extend the life of their pool filtration system.