Do you have CO2? What size tank is this? How long have you had the tank established? What's the plant mass? What's your dosing regimen? How many watts and type of lighting were you using prior to cutting the light back? How many hours a day?
There are lots of variables here, and answer most/all of the questions above will give you more useful answers rather than yes/no.
There are lots of variables here, and answer most/all of the questions above will give you more useful answers rather than yes/no.