Greenwater is basically just that: Green Water which obscures your view of the fish, but is healthy. It is a product of fuel, fish, sun and a failure to have competition from live plants. Chemistry is not the cure.
HELP! Sick Fish! Twenty Steps to fish health. You LITERALLY can solve almost any Koi or Pond health outbreak with these twenty diagnostic steps and nothing's hard. But it's not "here's your pill" either. Downloads are available.
DrJohnson.net More than koi health, this site spans all things animal, by a real veterinarian who shoots you straight.
Fishdoc.co.uk By Frank Prince-Iles. A UK authority who put this site together some time ago and which is still relied upon as a major source of good Koi and pond fish information
If you need pet information AND Koi pondfish and pond information you might like DrJohnson.com which has everything from pet info, to vet info, to koi and pond fish. It has it ALL! Pet Information.
If you need pet information AND Koi pondfish and pond information you might like