@Rabidreject I would recommend not adding anything in with the Hydrocrop nutrients; no supplements or additives of any kind. Unlike a lot of brands, they really are a complete feed …They provide everything plants need so it’s not necessary to put in anything extra. And they are designed to work with either inert media or hydro (i.e. where there are no other nutrients present), so anything else you add just runs the risk of upsetting the balance. They are also very stable, so it’s either something you’re adding (probably the silicone) or not watching the pH that’s causing the precipitation.
I know Hydrocrop’s nutrients are not big on the cannabis scene, but loads of tomato growers use them, and cannabis has similar nutrient requirements to tomatoes. Coco coir, perlite and the nutients are ALL you need. Easy, effective and cheap …Just ensure the pH stays within the 5.5 - 6.4 range. As I said before, the nutrients are buffered to stabilise the pH so it should hold pretty steady once you’ve set it.
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