"lollicup" technique at OG Kush

This week I had to trim the roots, the 16oz pot, however good it is, is limited by size. The plants were drowning in the root itself by accumulation of water and salts.... About nutrients: Some plants started to look wrinkled and down. I assumed it could be excess of the "Micro" fertilizer. However, some leaves started to lighten much to the same extent. When I put the previous proposition, as indicated on the manufacturer's website, they still wrinkled more. "Claws" like an eagle.