Some problems-feedback is appreciated

Hey,

I'm pretty sure i can handle the diagnosis on these, but i always like feedback. I have some yellowing on my bottom leaves, which i believe is due to a ph imbalance. I bought a ph meter but i think i was putting it in too deep bc it said only put it at root level and i had it all the way in.

I'm also getting the feeling that i have overnuted my plants, but i've only fed them once, however i did mix manure into their pots.

One thing that scares me is the idea that ive got some of gnats, as ive heard their infestation can resemble a overnute/ph problem.

any help is appreciated, here's some pics

those leaves will die and fall off. it is normal. the tips of the top leaves do look nute burned but it looks like it happened awhile ago. i see a slight curling upward of the leaf edges, i forgot what this means.

I say the brown tips are a sign of a slight nute burn..but nothing to get concerned about yet. Just wait to fert again and watch 'em.

The curling up of the leaves is heat stress and them cupping toards the sun. They look to be outside...so this is fairly common when it really gets warm...especially if they are small and are down "on the dirt' so to speak.

yellow leaves on bottom are normal and should just fall off

my $0.2 anyway...

bt dt