I think it's better to fill with pure water because nobody can tell how much NPK stays in the mix. If the ppm drops to much maybe you need to change nutes more often, that mean that the plants are sumotori. I don't have that much difference. For instance, 7th week of flo, starting EC at 2.6 now it's 2.14 after 3 days, water level has not changed a lot, so i let it go until sunday, EC will be at around 1.6, still good, there is something to eat anyway...
Fhydro
fhydro Reviewed by fhydro on . Top off res with nutrients or just water? Hi, after mixing a fresh reservoir of nutes (in an aero system), the ppm was 1350. 24 hours later, it was just under 1000. Next day, it was under 800 â?? a pretty weak level for foot-plus plants. Iâ??m a complete newbie to hydro, so I was wondering: should I be replacing what they eat everyday (bringing the ppm level back to 1350 daily), or should I let the plants drain the drink down to ? I read on this forum one opinion that replacing what they eat is good. But logic is also telling me Rating: 5