| John: There is nothing wrong with a rock bottom water garden pond, although the rocks will get covered with algae unless algaecides are used virtually weekly. The overall effect makes a really nice background for waterlillies and other water plants. As a home for koi, however, they are a catastrophe. Of course, if a person thinks of their koi as temporary ornaments they will replace each year...... well, our domestic breeders need to sell their culls to somebody. |