A picture would be great to help to identify the issue. I have used the flora series with great success. Upload a pic of the plants and your setup. The solution you are using at this point is a bit weak if i am understanding correctly. The 1/4 teaspoon is for very young seedlings. Also, with tomatoes, a good formula is to continue to use equal parts of grow, micro, and bloom. Just for future FYI.. Dont use the formula on the bottles as they are not specific for growing your vegetables, but more a general formula for growing other flowering plants.

Also, your PPM of your water with no nutrients need to be tested so you can tell how much actual nutrients you have added. For example, my tap water is about 250 PPM. If that is the case with your (if using tap water) your actual nutrient strength is 250 ppm less than what you are reading.

Again, pics are best for helping to determine possible issues.

Hi kkamm, thank you for your reply. Here is a picture like you requested.

I am running a 400 watt MH light set to 50% for now, and it is 3-4 feet above the plants. I am going to slowly lower the light and increase power as they get used to it.

I checked my ppm before I started to see if I needed the hard water nutrient formula, and although I cant remember the exact number, it was under 100 ppm.

Another pic

Looking at your pictures, the seedlings are pretty young and shouldnt need any more fertilizer. Again, they really dont need any until you see the second set of true leaves. Another cause could be over watering. In DWC, this seems a bit confusing since the point is to have roots dangling in the solution, but with newly planted seedlings you want your water just below the bottom of the net pot so that only bubbles bursting wet the hydroton. Im saying this without knowing the internal conditions of your system, so you may already know this or have this correct.

Another issue could be not enough light. Sounds like this is a possible cause with your light so far above the plants and at 50%. You want your light as close as possible without it burning the plants. You can play with the distance and judge the heat by placing your hand at plant level. Plants love light and need it to produce chlorophyll which is the green we are looking for.

In all honesty, with how small the plants are, I wouldnt worry about it too much. You may find in a few days or a week, they may correct themselves, but try making the few adjustments i mentioned and see how they do.

Thank you kkamm,

You may be on to something with the water level. Right now it is about a half an inch into the net pots, so the hydroton is very wet. I will correct this and slowly intensify the light. Thanks again.