These premium quality, black plastic buckets can be used for a variety of gardening applications. Many growers use these as containers to grow their plants in. You can even place the 3.2 gallon bucket inside the 5 gallon bucket to build your own hydroponic growing system. These heavy duty 5 gallon pales are solid and 100 % Light Proof. Use for simple bucket systems, reservoirs, watering containers, or plumb to make a soil container.