Review on 🔌 Fluval Rubber Adapter for Ribbed Hosing, Models 304, 305, 404, 405 (2 Pieces) by Eric Castillo

I used these to install an in-line carbon dioxide reactor. I didn't realize I needed them at first, so I was disappointed that I had to buy something else. Once they arrived they were easy to install and sealed for a week. I can confirm this works for the hose that comes with the new 307 filters. I used one for the CO2 reactor and one on the filter valve itself. They are perfect for both. Edit: Two years later and moving across town and they still haven't leaked once.