Just transferred my plant from aeroponics to DWC. Issues....

This is my first grow, and I am having so many setbacks! My plants are about four weeks old now. I only have two, I am trying to let them grow to be mothers. The aero unit I have is great, but the plants quickly outgrew it. The roots were getting very tangled up in the system. I decided to switch my mother plants into a DWC system for this reason. I only moved one at a time. the one I moved is not doing well. The bottom leaves are yellowing at the tips and the leaves all seem to be drooping down. Per the advice of the guy at the grow shop, I transferred my plants that were in 1" rockwool into 6" rockwool cubes. I split the 6" cubes in half, and set the 1" cube that held the plant on top while trying to gently drop the roots down to the bottom of teh bigger cube. I moved the plant two days ago, does it just need time? It seems to be getting worse every time I check it. The water in the dwc is about a 1/4 below the cube, is this ok? I'm lost, any advice is appreciated. Thanks

ehh...
you said nothing about PH... nothing about PPM, nothing about the type of water you are using(RO or tap), nothing about bucket size, nothing about RES temps, lighting wattage, nothing about medium aka hydroton or coco

Step your game up

You're right ocean. Iv'e not posted often. After doing some serious searching last night/this morning I see how important all those details are.

MY plants are about four weeks old. They are in individual black 5 gallon buckets. They were pulled from an aero setup in their 1" rockwool cubes. I placed them into 6" cubes from there. The larger cubes were split open so I could spread the roots throughout the cube. They started off as clones that I got from a friend. Two strains, one is New York city diesel, I am unsure about the other one. Both plants are about 7" tall right now. I have not been as diligent as I should of been on checking my nutrients. After reading some post I see that the ppm and ph dropping or rising could indicate something.

I just changed my nutrients. I used half strength sensi part 1 and b and 1/4 strength thrive alive. I adjusted the ph down to 5.9. The ppms are currently at 600. I use tap water, it has right at 200ppm. After typing all that I am wondering if I am not using enough nutes... These plants have been through hell. When I first got them I was not ready. My AC was not set up and temperatures exceeded 100F twice for a short amount of time. Started off with 6 clones, these are my two remaining survivors.

For right now I am using 4' high output T5's. I have my lights about 18"s away from the plants. The top leaves look great, I don't think it is heat stress. It's only the tips and the bottom leaves that are not doing well.

I am using CO2, so I thought higher room temps were OK. I currently have my room set at 79. The res temps hoover around a scary 78F. Honestly, I never checked that until now. My buckets sit on a concrete floor so I thought they would be fine. I will have to do something about that for sure. I'm not sold that is my only issue though.

I can't afford a chiller right now. What are easy fixes for my res temp issue? Should I somehow join my two buckets so they can have one separate reservoir so I would only have to worry about one res and not one per bucket?

I'm definitely in over my head, I have a lot of research to do. Unfortunately, I have to go to work and deal with this in a few hours. If there is any more information that I can provide that would assist in finding my main issue here, please let me know.

Your PPM and Res Temps are a bit high. 4 week old plants should be more in the 200 to 400 ppm range and res temps should be closer to the 70 degree range.

EDIT: Add a little ice to your res to get the temps down...you can freeze PH adjusted water.

before I went to work I moved my air pump directly in front of my ac and added the mylar tops to my bucket system. I managed to drop the res temp down to 73 doing this. Phed water is being frozen now, that should cool things down and help lower my ppm's. Thanks Ocean!

I still think I have more issues here.

The second picture is the plant I am most concerned about it. It appears to be yellowing, especially on the bottom leaves. How can I determine exactly what this is? I looked around online, and I think it is an overfeeding issue, or a nitrogen deficiency.

The third picture is another plant that has me worried. It looks healthyish, but the stems are purplish red. I read that some strains are like that. Any ideas?

The first picture is a seed I germinated. Am I right in thinking it is still too small to determine if it is a female or not?

Thanks in advance for the help

Well, Im no expert but am in my first sucsefull harvest week (yay to me). but anyway i would recomend picking up some calmag plus from your local hydro store. besides that your plants are to small to see sex, you wont really see that till your like god damn theese things are taking forever. lol but besides that looking good man