Hello fertilizer experts, I just got back the soil test results for a customer whose garden is not supporting any life whatsoever, not even weeds. Background: This gentleman also has a koi pond and used the sludge from the bottom of the pond as fertilizer, thinking there's lots of good organic matter down there. There also may or may not be lots of algaecide as well. The test results indicated off-the-chart levels of potassium. Where a normal K level might be 200 lb/acre (give or take), his registers 3405 lb/acre. Questions: Is this enough K to kill anything in the garden? Could this have come from his koi pond? Is there any way to reduce the K so that it approaches normal levels? Or do we just have to remove the garden soil and put in new stuff? Any ideas would be appreciated. Thanks a bunch.