Well Water

[alton]

I use RODI all the time but I decided to try 50 gallons of Brackettville water from my parents well. Drilled in 1929 they use it to fill up a stock tank, it had been running for 24 hours before I pumped my 50 gallons in 10 buckets. I tested 6 gallons of freshly made salt water with RODI and 6 gallons of Well water with an API test kit. RODI no Nitrates, well water 10ppm +. Remember it came staright out of the 300' well with no storage tank and the plumbing is PVC. I know the water levels are low in the county due to over pumping from surrounding counties, so normally it is harder. But I never thought of this great tasting well water having nitrates?
Anybody have any ideas or readings from your wells or tap?

[Brickster]

Evey well is different. I'm in Kendall County, sitting on top of a huge piece of limestone. My particular well water has no organics, but very high TDS. Well water is pretty universally going to be harder than SAWS water by a fair amount. That means it chews up pumps and makes ATOs very finicky.

I use well water in my tank, but I'm aware that everybody would be happier if I didn't. My well tests 0ppm for NO3 and P, but it's what I can't test for that potentially concerns me. At the very least, it's heavily buffered at about 7.8 (so says my f/w tank) which is not ideal. For all that mineral content, it doesn't seem to do anything beneficial for either coral, or plants. It's basically just in the way. At worst I could see it binding up some of the 'good stuff' in your salt.