A Gardeners Forum Forums General Discussion Landscape trials and triumphs Water Gardens Disappearing Koi and Appearing Algae

With all the lawn and flowerbeds (thanks to the mystery plant forum that we know they are flowers and not weeds!) that we inherited from the previous owners, we also got a pond!! Since we moved in right before fall...we trimmed all the yellow iris and took out the dying water hyancinths and covered the pond with a net to protect from leaves.
At this time we had very active 8 Koi's.
We of course stopped feeding them when it got cold.

This spring when we opened up the pond, the pump broke and the pond got filled really quick with algae and so we proceeded to get the pond vaccumed and cleaned. Since the pond guys came in and cleaned it out, the algae came right back within a week..we are cleaning all the filters and have the waterfall and fountains running too. We put in some rolls of barley..one by fountain and one by the pump and threw in some tetra pond algae cleaner too.

In the meantime the koi's disappeared!!!!
When the pond guys were cleaning they could not find them too...they had to look real hard before they found them hiding under plants and rocks...
We bought two new koi last week hoping they will make the others come out but they disappeared too...we have seen one or two of them come out from benind the rocks that are in the pool around the lining so maybe they are hiding?? I cannot understand why?? They were so active last year....only one is big and the others are maybe a year or so old.

So between the constantly disappearing koi and re-appearing algae..I think I am going crazy!! Please advise. Thanks.....

I don't know anything about ponds or koi's or algea, Sorry, wish I could help, But wow you got some really nice bonuses with your house!
I hope someone comes along and gives you advise soon,!