For the Serious Koi Keeper Only! Hikari is known for "over the top" quality when it comes to Koi Foods. Hikari's Gold is fed during "pond season" while the koi are at their hungriest and preparing for the lean winter season to come and is specially formulated to bring out the color in the koi. It is available in 3 sizes of floating pellets. Mini is for the "babies" of the pond and compares in size to M-Color's Small Pellet size. The Medium-sized pellet is for the majority of the koi (and goldfish) out there and it's comparable to M-Color's Medium pellets. The Large pellets are for jumbo koi. The quality is the highest on the market but it does carry a hefty price tag. For excellent nutrition at an AFFORDABLE PRICE try the M-Color. If you want the absolute BEST QUALITY (and price is not as much of a concern) the Hikari Brands of Koi Foods are for you.