This is my third season having a pond and my third time re-building and redesigning... Based on the dimensions and depths, it's roughly 1000 gallons and I have 1 koi 14'', 3 commets 6-8", 1 small commet 4", and a little shubumpkin. I added a lot of stone this week and made the mistake of putting pinkish white on the bottom. I thought it would brighten things up but instead, now my crytal clear water looks pink and my fish blend in with the stone...Tell me what ya think..