c02 ppm

Does anyone in here suggest having over 1500 ppm or is it just a waste..I heard of people starting flowering with 1200 ppm and increasing the ppm in the room every week by 100 ppm.. Example week 1=1200ppm week 2=1300 ppm by week 10=2200 ppm..What do you think?

anything over 1500 ppm cant be assimilated by the plant fast enough to do any good,which is why 15 is the accepted level.I've heard of doing that,but I dont do it,I feed em 1500 all the way through.