Green water and blanketweed

摘要

Admit to some people that your pond is full of green water and you could be faced with looks of sympathy or horror. Why? Sometimes green water is a good thing! In Japan some Koi keepers rent mud ponds to "finish" the Koi they want to enter into competitions. The mud pools are usually full of green water, as it is highly nutritious. In this "green" environment you can find that Koi tend to grow faster and their colours develop better. Certainly we saw this happening when our pond mark "5" went through the normal pea green stage of new ponds.