Help with N L. 2.5 weeks

The plant was doing amazing, strong roots and growing like crazy. but about 5 days ago the roots got all tangled together in a root ball some how and now the plant is drooping all of the top leaves are sagging as if it's from over watering. we don't know if changing the air stones caused the roots to tangle up and now the plant is getting less oxygen to the roots? I started top feeding it and it started growing healthy roots out the side again but still no progress with the plant looking any better. Any Ideas would be appreciated.

This is what the roots look like after i ran them under water and tried to untangle them.
 

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