Hi there Ganja, actually rock wool is really not so great for germination, that's why most professionals dont use it for their grow unless they have really good reasons to like using NFT or making a sterile environment. something about the rock wool i think is maybe "too sharp" for the roots, so it causes stress and maybe damage. After the first few difficult moments it's fine but basically using rock wool is a bit more complicated than normal. First you always have to soak your rock wool before using it something like 24 hours. second you want to keep it moist but not too wet, you need to follow the wet dry cycle even more closely because it dries in a fast way. Third, you should try to use a spray to feed the seedlings at this stage , make it from Emerald goddess, there's plant growth hormone in there and it will act faster and better through the leafs (and anyway the root is too small at this stage) . Finally , i would cut out Root Wizard, this kinda juice is more suited to soil grows , it may very well be causing stress due to its trichoderma harzianium which will litterally eat and fuse with the roots. Usually in rock wool the point is to make it as sterile as possible, so replace that with something like fluvic acid if you want an additive (and you should!) Hope this helps ! 🚀