Ppm tds?

what should my ppm be?
i just got a meter today
im doin a dwc and using flora nova by gh

ive always used 1/3 the strength recommended then go up from there based on there age. but a safe PPM to use in DWC for the babies is around 400-500
and for mine now in flowering i keep em at 750-950 PPm and have great results and using Fluors the whole way. Good Luck bro

my ppm was 475 the first time i ever checked it and its 6 1/2 weeks old

iv been changing nutes once a week cuz i havent been able to check ppm