| Spring is just the time when the fish seem to get everything. It is unfortunately quite common to lose fish when you think they have overwintered fine. But when winter is quite long and the fish only have the healthy strength built up from last years food to keep them going their immune system is quite low. As the water warms up the parasites and germs laying dormant in winter start to attack the fish and the fish don't always have the strength to fight them off. I think you have done the right thing with the water change and the medifin.Take a look on the medication as you can often double dose. What I mean is wait so many days and then treat the pond again. It will tell you on the medication product. One thing to remember is if you have a UV that you turn it off throughout the medication time. I really hope you are over the worst. This happened to me a few years ago after I had had my pond 8 years. I was advised to put pond salt in and on doing so lost no more fish. This year I have lost only one fish. Last year and the year before none and 8 the year that I ended up having to put salt in. Previous to those years I had never lost a fish. It was awful to lose all those fish, but you should be comforted to know that it wont happen every year. |
Here is a link that might be useful: Alisons pond and garden
