nuteburn? ph? what?!

It could be too much nutes or over watering. How old is the plant?

33 days, i water her every other day and rarely any water comes out of the bottom of the pot holes. Ive read they cope better with being slightly underwatered than overwatered so i have been extra careful.

Could it be that the root system is not large enough, i explain. While it was a seedling and small plant it had only 40W of cfl, and now it is growing much faster with 125W of cfl. As roots develop early could it be that the leaves are growing faster than the root systtem can manage to supply?

Yellow are a sign of early nute burn. Because you are not doing a full watering, your salt concentration will continue to climb. You really need some flow from your holes wioth every water. You want to let the soil dry for a good 1 inch below the surface. Your roots need to dry out a bit so that they grow and search for more water...

Water with plain water next time, ensure you get substancial flow from the drain. Then wait until it is time to water again. Then go with 1/4 strength... no more, then slowly work your way up. I only feed once a week, and water in between. That way, you ensure you are only keeping the nutes you need in the plants, and are not building up a concentration in your soil...

Thanks mannurse, that seems to be sound advice. I was myself worried about flushing the soil but never was sure. I will be doing as you say. Its my first grow you see.

I forgot to add... listento your babies, they will tell you things constantly...

its too close to the light, or too hot or both. Nute burn will leave deposits(spots) on the leaves. Overwatering will have drooping or under curled leaves. Same thing happens to mine sometimes in flowering, as I have them within two feet of a 1000w hps. Just move them back a little bit, they wont recover physically, but will photosynthesise no problem