Weaping Plants.....+ rep

So my plants are starting to droop. New leaves (from the top of plant) are coming in very skinny. Other than that, they look perfectly healthy. So everything about my setup seems good. My temps run 77-80 constantly. I've been keeping the pH at 6.0 daily since they are vegging right now. My ppm is a shade under 700. I keep my light about 2 ft from the tops of my plants (it's 250W). My setup is a DWC. Each plant is in a 1 gallon container with a 4 or 6'' circle air stone. The air stones are powered by an Elite 801 air pump, which runs two stones. The pump is rated for 15 gallons. It makes a lot of bubbles, which is what really doesn't make sense to me. DWC, is new to me, but from other setups I thought drooping plants was either a heat issue, or too much water(not enough oxygen as a result).?????????????????????
Any ideas??????

Over watering probably. The difference between over-watering and under-watering is hard to put in words. They can actually have the exact same symptoms. In this case it is probably over watering.
Over heating is different, and usually makes the leaves curl up towards the tips and your temps look good.
Here is a classic pic of over watering:
View attachment 1547596

So just water less and see what happens .
wish you luck!

As a newbie I continued to overwater for a long time, and I did this even if every forum told me overwatering was the newbie-mistake number 1.

I did this because I didn't understand what over-watering really was.

So when talking about overwatering, I make sure to point out that over-watering is not about how much water you give (whenever you water them) - but about frequency (how often you do it).

Over watering over a long period without noticing is easy, because if you just water too often - but just slightly - the plant will take a long time to show any symptoms.

As a newbie I didn't understand this until I repottet a plant that was really dry (or so I thought) , which to my surprise was still moist at the bottom.