Every Pond owner should have a Thermometer in their pond at all times.
The effectiveness of treatments, fish health and feeding are all governed by water temperature.
A relatively cheap and simple product, the pond thermometer will help you understand your pond environment better.
In time with this greater understanding you can predict and prevent many of the usual issues with fish health and water quality from occurring.
Regular water testing and keeping an eye on the water temperature will go a long way to keeping a happy Pond and fish.
Floating Thermometer supplied with a length of cord to secure in the edge.