any tips

As Hashy said, do not feed full nutrients. Start out at around 1/4 of recommend and work up from there. As far as watering, you should water to runoff.

With autoflower plants I tend not to feed to heavily. Photoperiod plants seem to be able to take in way more nutrients then autos. I get leaf burn around EC 1.2 with autos.

Ola amigo, podes sempre seguir as tabelas recomendadas pelos nutrientes que usas.

Looks like your adding to many nutrients. Your leaves have a really dark green to them and the tips are starting to brown. Watering should be done when the soil is dry 2cm below the surface. Only feed every other watering Happy Growing

Overfeeding water doesn't seem to be the cause, but the PH could be causing toxicities. I would recommend getting PH test kit and PH Up/PH Down. This is because most of the smaller nutrients that the plant needs cant be properly absorbed, at a PH lower than 6.6. Low stress train the plant as well when you give it a heavy feeding. Good luck growing.