p.p.h.
04-26-2006, 01:08 AM
Is there an online SI calculator?
CarlD
04-26-2006, 09:47 AM
SI can be useful...
But don't live or die by it. If your other numbers are good, and your pool is clear, don't mess with stuff to improve the SI.
But if you are having troubles, the SI may help you pinpoint what is wrong.
Me, I keep it simple and stick to Ben's test kit...You'll rarely have a problem that it cannot identify--and 98% of the time that problem will be due to metals, bacquacil, or ammonia-based algaecides in the water.
mas985
04-26-2006, 12:08 PM
I have my own spreadsheet for the calculation but here is a good online version: http://www.advancedh2o.com/technical/calculations_and_tables/langlier.html
Some do not include TDS in the calculation which can create some error if you have a SWG. If I do not have a good TDS measurement, I estimate with CH + Salt level. This is pretty close.