Koi fish are known for quite a few different things. Their colors, their friendly nature, their rich history, and their massive appetites are just some of the things that people immediately recognize about these stunning animals.  Still, there is one thing that is noticed above all else: their size. Koi fish are huge animals and grow incredibly quickly, reaching lengths of two to three feet in very short periods of time.  This is why they are often kept in large ponds or custom built above ground enclosures. Still, some people have a strong desire to keep koi fish indoors. Let’s take