Or you can cut the roots. Not for the faint of heart. I think if you look up my name or just the first part. You will find a thread where Zandor had me take one out of a container of 6 and cut the roots off about 3 inches still in the water and compair how it does to the rest. Well it was no more than a few days behind the others and did quite well. I had to dose up on the hydrogen peroxide for the last 4 weeks to help with the roots rotting that were left but no real rot ever started. The cooler the water the longer it takes to start rot.