Fully modular design allows users to customize filtration stack for their specific tank needs
Rigid, reusable PETG construction ensures long-term durability and prevents collapse
No disposable filter socks required, reducing maintenance and waste
Supports mechanical, chemical, and biological filtration for optimal water quality
Compatible with multiple filter sock openings and mounting options for versatile installation
Summarized by Shop
CaddyStack™ – Modular Filter Tower (Filter Sock Replacement Kit) CaddyStack™ is a fully modular filter sock replacement system designed for reef aquariums that use 2", 2.75", 4", or 7" filter sock chambers. Unlike traditional filter socks that clog quickly, reduce flow, and require constant washing, CaddyStack™ replaces socks with a rig
Material
Reef-safe PETG plastic
Filter Types Supported
Mechanical, chemical, biological
Compatible Filter Sock Sizes
2, 2.75, 4, 7 chamber openings
Mounting Options
Circle mount, square mount, rectangle mount, trigger oval mount
Starter Kit Components
6 (2, 2.75, 4, 7) or 5 (varies by kit) depending on size
Dimensions (2.75 caddystack)
Height 11.5 in, Diameter 2.5 in
Summarized by Shop
4.8
44 ratings
5
4
3
2
1
A Fantastic Upgrade
Completely cleaned up the filtration in my rear chamber. Everything stays organized, water flows evenly through the media, and maintenance is much easier than the stock setup. It's well-made, fits perfectly, and makes swapping filter media quick and mess-free. One of the best upgrades I've made to my tank.
E
Esteban · July 23, 2026
Love these filter towers! Easy to clean and keeps our aquariums crystal
Clear!