Hey just wanted to stop in and say hi... plants look great!
If you want to avoid mold keep your humididty around 40% and make sure you have a little breeze.
I'm kind of confused-reservoir? It looks like soil to me... I haven't used hygrozyme, but I use Cannazyme and that product anyway you can actually double the conc the first time... dunno about hygrozyme... just watch though that as the dead root matter breaks down, some N is going to be released. But also C is going to be released and you might try hitting your plants with some Sweet to take advantage of that... just a thought!