 
Treat the water with Water Butt Treatment from Biotal. It is not harmful to plants and should eliminate the bad odour as well as clearing the water. It is worth emptying the butt once a year to wash it out and disinfect it with a weak solution of Jeyes Fluid.
| 
 Gardening Expert:  | 
If you can't find what you are looking for on the website then you can ask one of our experts. To get in touch with us Click Here
We will try to get back to you with an answer as soon as we can.
Did you find this answer useful? Subscribe to our newsletter for gardeing news, projects, special offers and competitions.
Royal Botanic Gardens Victoria
Melbourne, Australia
Singapore Botanic Gardens
Singapore
Majorelle Garden
Marrakesh, Morocco
Aswan Botanical Garden
Aswan, Egypt
Royal Botanic Garden Sydney
Sydney, Australia
Nongnooch Tropical Garden
Pattaya, Thailand