*Great White myco in foliar*

There is no point applying mycorrhizae (Gret White Shark, Mykos etc) to a plants leaves/foliar, as these microbes only live on a plants roots. You may have killed them. Pictures would have helped.

any photos?? The fuzzyness could have been mold or could have been myco from the great white. if it was the ladder it should not cause bad things to the seedlings. Even molds don't do to much damage in the water to plants. I would get some peroxide into that sprayer and let it sit and kill everything out of it. Plants might just need a bit more time and some water to flush out the fungi metabolites if its bothering them or altering the PH.