Yeah, the Crystal stuff is good, but ALL CHC needs to be well rinsed before use!
From what I've read and heard (i.e., unverified info), coconuts naturally absorb lots of sodium chloride as they grow. Whether that is simply because of the proximity to salt water or as a protective mechanism - or both - I have no idea, but the fact is that coir products are loaded with it.
A lot of rinsing wiht clean water helps, but adding calcium nitrate or it and Epsom Salts to the rinse water greatly accelerates the cleaning process. It's sort of the opposite of a water softener - the Na ions are taken into solution and replaced with Ca and Mg ions.
Ray Barkalow, Orchid Iconoclast
Using science and logic to advance orchid growing
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