Brown Spots and Other Plant Problems

Can anybody identify these problems for me. I'm using a bubble bucket system, ph has been roughly 6.0, hydroton as my medium. house and garden aqua flakes A&B plus roots excelurator and drip clean.

I'm really losing sleep over this worrying about my little girls

first picture is OG Kush second is AK48

You say that you're using hydroton as your medium in a bubble bucket but the first pic looks to be growing in a plastic cup. Whole-plant pics are usually necessary for a solid diagnosis.

yes the first pic is in a plastic cup. that is a different plant that is now in a smart pot.

here is a full plant picture

The Aqua Flakes are low in Phosphorus and the browning you're seeing is probably from that. The A is high in Nitrogen, the B is high in Potassium, and you'll want to find another source of Phosphorus. Fresh organic ferts that are high in P include Bone Meal and many Guanos.

Thank you, so much MF. I found another probable cause, my EC creeped up way to high, my target was 1.2 and I was at 1.6, so I'm believing it might be from nutrient burn. I changed the res and lowered the EC down to .9 if that makes the problem worse I will add Bone Meal.