4″ Filter Sock W/ Plastic Ring

Overview

The 4″ Filter Sock with Plastic Ring is a mechanical filtration staple for cleaner, healthier aquarium water. Installed in the sump where overflow water enters, it captures debris and suspended particles before they break down into nitrates and phosphates. It suits reef, fish-only saltwater, and freshwater systems alike.

Key Features

• 4″ diameter fits common sump filtration setups
• Mechanically traps fish waste, uneaten food, and detritus
• Improves water clarity and overall filtration performance
• Reduces waste buildup that fuels nitrate and phosphate spikes
• Rigid plastic ring ensures a secure, easy fit
• Works in freshwater and saltwater aquariums

Specifications

Frequently Asked Questions

Where does the filter sock install?

It mounts in the sump where water from the overflow enters the filtration area.

Is it suitable for reef tanks?

Yes. It works well in reef, saltwater fish-only, and freshwater systems.