What is a good PPM to stay at?

What PPM seems to work well for most plants (both indica and sativa)? My water is 250 ppm to begin with (Calcium and magnesium I suppose). Is 1500 ppm a bit much? Is 1200 to 1000 usually a better level to stay at? I seem to notice a bit of leaf under curl occuring around 1500 so I'm guessing it is a bit much.

Id suggest doing some more reading on ppms. They will need different ppms depends on how old they are, but over 1000 is flowering only.

i have 250 pmm well water....

i use keep it simple method...(i call it the lazyway)
all of veg i keep it around 400-450
in flower i only go up to 600
i use dyna-gro and pro-tekt and h2o2
i only change the rez and leech salts once a month (i have done 6 weeks in veg before...it worked fine)
once a week i do add backs...

Sorry, knew I was forgetting something. Yes, I'm in flowering. babysas, that sounds like a weak mixture only for sprouts.

I decided to back them off a bit to 1100. Considering the base water is already 250, that's a bit under 1000 but I'll see how it goes.

I like 1050 to 1100 as a cap ppm level

i agree im at 1050 ppm i run same mine always produce huge 1gram watt noproblem then round week 51/2 i wein N out rasieing pk 100ppm plus amount taken from N 61/5 i drop micro n only flower nutes then 6 days flush n done up to 1400 ppm