has anyone had problems with koi in well water? The water is greenish and the bottom of the pond cannot be seen. the pond is about 1 1/2 month old and DID have 3 5" koi and 1 larger goldfish. The pond is about 1200 gallons with a center that is 30" deep and a more shallow shelf on the rim. We have a bio filter with mesh media going down to a fall, lily pads and aqua grass in baskets with sphagum a and river rock. We used the black pond liner. It is part sun for most of the day. ...

vedalissa