Koi Fish Information Centre

Quite simple, actually. The males have a modified anal fin that is known as a gonopodium, while females will have a full anal fin. Males also are slimmer and have less deep bodies than the females, and tend to be slightly smaller. This last is not truly definitive until all the mollies are full grown.
Though […]

Here is the reference page in original post.I took the time to copy it and paste it for anyone unable to click on it
http://guppyplace.tripod.com/WaterQuality.html
Toxins in the Water: The Invisible Culprit.
Heavy Metals such as copper, iron, zinc, and lead destroy the fish’s slime coat, cause blood patches, cloudy […]