Perigos de não ter medidor de ec?

Hello my friend! Greetings from Chile! Look, technically I shouldn't lose a harvest for not measuring EC... What I recommend is to use purified bottled water (it contains 0.0 EC) and use the fertilizers just as the manufacturer mentions... for example: 3 ml per 1 liter of water once a week, stick to it 100% and you won't have losses, only gains! Cheers, my friend! pH is more important in this case, I recommend buying a pH meter before an EC meter... since pH is the gateway to your plant's nutrition, the recommended pH is from 5.8 to about 6.7... It depends on the strain... if your irrigation water exceeds or has a lower pH, your plant won't be nourished optimally. In simple words, you can lose a harvest due to pH, it's harder to lose due to EC because manufacturers always mention the correct dosage of the products! Cheers, my friend!

An Ec meter is a real handy tool. With one you know how strong your nutrients are. Not essential and definitely won't make you loose or keep a crop.

Well no not necessarily loose your crop. But it helps with knowing exactly how much you’re feeding your plants. Example. One day I was mixing my nutrients. The chart called for 1400 PPM and I guess I made a mistake somewhere with my measuring spoons and I was over 2000 PPM. If I didn’t have the meter I would have missed my mistake and it probably would have been bad news after that feeding.

No you dont need an ec meter its just better to have one you cannot loose your crop for not having an ec meter dont worry.