Help please... is this aphid damage?

Normally with over watering you will see yellowing of the leaves or if it is real bad root rot you will see wilting because the roots are damaged and can no longer take up water.

If is not really extreme over watering then CHECK YOUR PH. obviously your ph is to acidic..it looks that way at least. Do u check your ph?

Honestly I haven't been because I watered once only with glacier reverse osmosis water since i picked them up. Wasn't to concerned with it because my buddy was watering them with straight tap water and they were healthy as can be!

Also, roots are healthy white.. popped em out and checked em a moment ago

are they still looking better? you said you clipped off the infect leaves and hit em with Hydro and baking soda?? new growth looking okay??