Spring is around the corner and begging new to ponding what should we do when temps start rising and the koi begin to be more active. When do we need to do a water change and how much at that time what kinds of things should we be doing to prepare for the up coming season all advice is welcomed this is my 1st spring so I have no idea what to expect. I was looking threw the hole in the ice yesterday and could see all the koi and gold fish slowly moving around so I know they are doing good so far under the ice.