X1 Supplement Storage 5LThe X1 Supplement Storage Container holds over 5L (1. 25 Gallons) of dosing solution. It's perfect for larger tanks and supplements that see a lot of use like Calcium and Alkalinity. Each container has measurement lines in 50ml increments for level checking at a glance. Each X1 Supplement Storage Container measures a compact 4. 75" x 7. 5" x 11" tall (11. 5" including Hose Barb). The built in hose barb works with 2 or 3mm ID (1 8) tubing, and a 2. 5