Tetra Koi Colour & Growth Sticks Tetra Pond Koi Colour & Growth Sticks is a highly palatable, premium quality, complete floating food for Koi and all other larger pond fish. It is made with BioActive formula for a healthy immune system, increased energy, and improved vitality. This food uses the finest high-quality ingredients to give your fish everything they need in a balanced diet. Available in 3 different size packs, from 270g to 2200g. Please select the required size from the drop down menu.