mould

[grantleslie1]

can I use apple cider vinager to kill mould on and around the rock wool and if yes how much

[furrysparkle]

I would suggest buying some SM90 first it'll be more of a sure thing if it is mold.

[alltatup]

can I use apple cider vinager to kill mould on and around the rock wool and if yes how much

Hey grant, you don't want vinegar anywhere near your roots. I have simply picked off the algae and spoiled rockwool. But you don't want light on the wet rockwool: put covers on top!!

https://www.amazon.com/Hydrofarm-HGCOV6-Rockwool-Block-Cover/dp/B000ICXKRA/ref=sr_1_2?ie=UTF8&qid=1483350489&sr=8-2&keywords=rockwool+covers

Just make sure you buy the right size: it should be a little larger than the circumference of the pot.