Hey budz! Glad to see things are going well in here and that you got through your algea/slime issue. Always nice to be that close to a hydro store, closest to me is about 3 hours any direction so I normally order online from one of them if I need something, ships fast.
I see you're trying out the lucas formula. I remember reading up on it back when I was trying out hempy buckets and I thought about trying it but never did. Since then I had kind of forgotten about it since I have majority of the GH Flora lineup lol I might have to try it sometime as a comparison, feed a few the lucas formula and the other few my regular feed. Interested to see how it works for you nonetheless and maybe I will go for it.
Plants are looking strong and mighty, keep up the good work. If you're looking to maximize your light penetration, lower that MH light down some more, the plants will thank you with tight new growth
That is of course unless heat is an issue at the canopy.