HOWS THE COLOR OF PLANTS ?

I agree... they look very blurple...lol and your DWC plant is very sad. But I took a look at your DWC diary and your info says your day temps are 32c and your water temps are 25c, is this correct? If that is the case they are both way to high. Get the room temp down to at least 28c but even lower preferably, mine sit at 23c-25c. And one of the most crucial thing for DWC is the water Temp, along with ph and ec. So you need to get you water temps to between 18c-20c. No more, no less.At 25c your plants are really struggling to get the oxygen they need from the water so the are essentially slowly drowning. Ph should be between 5.8-6.2. And ec will vary with stain and what stage you are at, but a good rule of thumbis only give them 1/2 the recommended dosage and go from there. Set your water ph at 5.8 and let it drift up to 6.2 over the next few days. At the same time you should see your ec drift down slightly, this means the plants are feeding and all is good. If the ph swings down and ec goes up instead, then you are over feeding and need to dilute the water more or change it. Hope this helps ya! Cheers💨