Can you verify that the report says 0 total alkalinity and a hardness of 4?
I have never seen a 0 alkalinity. 4 which is very bad is the lowest I have heard of. also it looks like very low to 0 nutrients in the water. Is that correct also?
Can you describe how the water looks? Clarity etc. ?
See this
https://srac.tamu.edu/index.cfm/getFactSheet/whichfactsheet/262/Here is what Esshup is describing

