Hi Tony, good growth in view of the fact that it is still cold in the Cape. Our water is still only 14 degrees and yours are probably the same. If you really want to see huge changes, you should monitor those Kumonryu's you bought from me. It is normally amazing to see how they change in colour when the temperature heats up. My kikukuryu's are already changing a lot. They are also known as the chameleon's of koi because they are the metallic version of the kumonryu's. Rgds Paul