peekaboo

too much nutrient in soil. They curl because the salts (fertilizers) are at a higher concentration in the soil that in the cells of the plants. The water is leaving the leaves to move into the higher-concentrate soil.
If the whole plant was sagging, then too much water, but in this case, just water with plain water for the next week, then continue fertilizing... but cut your fertilizer concentration back to about 1/2 the label-directions

but only the bottom leaves are curling...not the top ones..

Yes, that's consistent with nutrient overdose. Since you haven't yet seemed to have burning on the leaves, it tells me that you've added too much, but not a lethal dose. If continued, you'd see typical crunchy leaves begin... at the bottom. The reason the bottom leaves curl first, is because the Veg. Cycle nutrients are highly mobile (that just means those molecules are able to travel up-and-down the vascular system of the plant) within the plant tissues. If you have a deficiency OR too much, the bottom leaves go first, then your whole plant will shit the bucket.

ok...I also heard it could be a Mag. Deficiency...what do u think?

Mg would cause the outer leaf edges (of the older leaves) to turn yellow, while the inter-veinal regions remain green. It probably also wouldn't result in wilting. If you have been using a Cal-Mag supplement or a 1-Part Nutrient that is basically anything OTHER THAN Miracle Gro, then you would have provided enough Mg. Plus, plants usually don't utilize Mg until the pre-flowering stage.

gotcha....so im gonna water them with PH balanced water for 1 week..and then start using the ferts...