leaf curl

the leaves are curled under and bottom leaves are turning yellw at the tips.
10 gallon ebb and flo. flora micro nutes and low ph

dude...sounds like some heat stress to me. whats your grow area temperature sitting at?

Leaf curl under usually means overfertilization. It can also be caused by the following: K deficiency or Copper deficiency. Copper deficiency is rarely seen in indoor plants, therefore rule it out. Most likely overfert.

Older leaves turning yellow is most likely Too much Nitrogen, can also be the start of Magnesium deficiency.

My guess both problems are overfertilization. Hope this helps Gatey-baby.

thanks Lola,
I will Back off the nutes and see whats up.
I will wait till they tell me they are hungry for more.
I will be ready to take clones for sexing in the next week or two.
Will warmer water make them grow faster then cooler or colder water?
98 degree water versus 50 degree water?

I just went through this with a bro of mine. 98 degrees water, root rot and slime. 50 degrees water, leaves yellow and fall off in a couple days.

Target water temp 68 to 70 degrees, max oxy in the water. Canopy can be alittle higher as long as it doesn't affect water temps.