On yet another note...
I think I found the culprit for degrading solutions... KH2PO4. I had a solution of KNO3 and K2SO4 and K2Mg4 for two weeks, and it didn't get the typical smell. So now I mixed them up for four weeks!
I can add the P once a week, or rig up some more of the Fluidosers to add it that way.
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