Having a little bit of trouble

Having a little bit of trouble with my plants,

I have one bubblebucket and three others in soil.
If anyone could give me any advice on what the problem is with the leaves i'd very much appreciate it:)

Root in bubble bucket look promising, and are growing rapidly everyday, but about 4 days ago, he leaves started curling downwards and getting a little dry with the leaves turning darkish in color. same with the other plants. the bubble bucket i'm using osmosis water and the soil i'm using pure rain water.

soil

ugly baby

any feedback would be nice:)

fill out the troubleshooting form in my sig.

-shake