Plant problem (pic)

Hi Guys

Im on my first hyrdoponic grow, im using a recirculated drip system in a tent and im growing 6 x super skunk from seeds.

I germinated them in 2 inch rock wool cubes, and I've now put the cubes into my pots which are filled with Hydroton (clay pebbles). They are now 1 and 1/2 weeks old.

5 of my seedlings are looking fine but one of them has started to go yellow at the tips of the leaves.

Im running an 80 litre reservoir feeding all 6 plants, Ph is 5.5 - 5.8, im using THC grow nutes at 500PPM (which I suspect might be a bit too strong?). Lights are 3 x 600W HPS lights in cool tubes.

Room temp is 27c.

Pic is attached (pic 1) can anyone tell me what the probelm is? I've also attached a couple of pics of my setup.

Cheers

I wouldn't have nutes on them this early,put nutes like 2-3-4 week

Nutes are to stroung and your ph is low

Thanks I will flush it out tomorrow. So you guys recommend no nutes at the moment just straight water? What Ph? I just checked it again and its 5.9

kootabuds said:

Thanks I will flush it out tomorrow. So you guys recommend no nutes at the moment just straight water? What Ph? I just checked it again and its 5.9

Click to expand...

In a soil grow no nutes for the first 3-4 weeks is normal because a good soil will have what a young vegging plant requires. Hydro is different. Even though they are young they can't live on water alone after the first little fat leaves (catolyns?) are yellow. They are born with a small amount of food that they supply themselves with. After those are yellowed, they are drained and in hydro they need a small amount of veg food for the plant to continue to grow. 500 ppm may be too high for the young plants drop it down to 250 and see what happens. Your ph for hydro is good.

Good luck