Missed last week, been busy on my truck. I read that a top layer of sand over the medium will end a gnat problem. Since this was my last top dressing, i went ahead and tried it. Within a few days, zero flying pests, so thats good. One of the gelatos was very spindly and weak, so i ditched it to give the rest more space. They seem to appreciate it. One of the gelatos is quite impressive. Has a foot long cola forming and smells amazing. I've started adding a little calmag because i noticed some rust spots.