I just say do it all at once and drop your photoperiod to 2.5 or 3 hours or soto start....... add 30 minutes every week.
Im a fan of maxing out each tanks potential photoperiod as much as possible......andby contiunuing to add slowly until it appears you have went slightly too far...then you can take it back to what was good and be left with the best photperiod for your system
jmo
|