Need help with water.
I refilled my pond about a week ago. two days ago I bought some feeder goldfish, which I thought could survive in just about anything. Nope. they all died. The only thing I had to test the water was a tester I had used for the acquarium. When I tested the pond water the PH was as high as the color on the test paper went. Is there anything I can put in the pond to lower the PH and I'm wondering why it is so bad now because the other years I had no trouble at all keeping the fish healthy. Well, except for last winter when the pond heater failed. RATS!!! Any ideas from anyone? Thanks so much for any help you can give me.