Before we get to technique, you need to understand what’s actually in your hands.
First, What Makes PackBest Live Fish Bag Different?
- The Material Advantage: PE + Nylon Composite
PackBest live fish bag is constructed from a PE + Nylon composite film—a high-strength, multi-layer material that resists tearing and puncture. Made from resilient nylon, it withstands pressure, drops, and vibrations far better than standard alternatives, creating a protective cocoon around your fish. For fish farms shipping mature stock or e-commerce sellers handling ornamental species, this means dramatically fewer in-transit losses and far fewer “dead on arrival” complaints.
- The Valve That Won’t Betray You
Here’s where traditional packaging fails most spectacularly: the seal. A rubber band loosens. A knot slips. A heat seal cracks. Suddenly your oxygen is gone, and so is your customer’s trust. We’ve all seen the complaints—”the bag leaked, the water ran out, the fish died”.
The PackBest live fish bag uses a patent one-way air valve. Oxygen goes in—it doesn’t come back out. The valve locks in oxygen and locks out leakage automatically.
- Transparency That Works for You
The live fish bag is fully transparent, so you—and your customers—can observe the fish’s condition. That visibility builds confidence when your customer receive the fish.
The Correct Way to Pack: A Step-by-Step Guide
Even the best bag won’t save your fish if it’s packed wrong. Here’s how to do it properly:
Step 1: Check Your Bag Before Anything Else
Before adding water or fish, inspect the bag for any manufacturing defects or damage. A quick visual check takes five seconds and saves you an entire shipment.
Step 2: Water First—But Not Too Much
Fill the live fish bag with clean water to about one-third of its total volume. This leaves sufficient room for oxygen. A bag mostly filled with water doesn’t hold enough oxygen, and your fish will suffocate during transit.
Step 3: Add Your Fish—Don’t Overcrowd
Place your fish in gently. Overcrowding is one of the most common mistakes—too many fish consume the oxygen faster than it can dissolve, and even the best bag can’t compensate for that.
Step 4: Remove Excess Air, Then Inject Pure Oxygen
Press out the ambient air already in the live fish bag. Then, using an oxygen cylinder, inject pure oxygen until the bag is plump but not stretched tight—roughly two-thirds of the total bag volume should be oxygen. The one-way air valve ensures the oxygen stays locked inside.
Step 5: Secure
For long-distance shipping, we strongly recommend placing the filled bag inside an insulated foam box with ice packs to maintain a stable, cool temperature. The PackBest live fish bag material is designed to perform consistently from -35°C to 65°C, so it holds up even under demanding conditions.
Ready to stop losing fish—and customers—to bad packaging? Visit https://enpackbest.com/ or contact our team at info@packbest.com to discuss your specific needs. Our packaging specialists will help you design the ideal solution for your business, with rapid turnaround times that keep you moving.
