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Hello my friend, there is only one thing to determine optimal growth rate which is the Vapour Pressure Deficit (VPD) which is the relationship between temperature and humidity. At this stage you should have 70% humidity and 25 degrees , so it's a problem with humidity. Just try to spray the plants with water up to siix times a day and hopefully it will be optimal for them again. To learn more about VPD and to seriously level up your grow try to read this one : https://pulsegrow.com/blogs/learn/vpd hope this helps ! 🚀

Hey there Polliceverde , looks like some water droplets could also have burned from the light, you can spray, but be careful , thiner spray , it can also affect the growth. Above when you say you dont adjust the pH, at least you should measure the pH. In soil it should not be a problem because the soil contains quite a lot of natural bacteria that will manage the pH quite well. If you're not sure , try bacilus subtilis and trichoderma , this can prop up the soil matrix . When you measure pH you should be watering with pH 6 , outflow should be pH 6.5 , you can get some cheap pH strip accurate to .1 , hope this helps ! 🚀

Ahh, got it and thanks for the clarification Polliceverde18. Yeah I agree with you, LED marketing on whats comparable to 1000W can be misleading. What I look at is the ppf for both and then also consider the color spectrums gained as well. So if we use your example, I believe a 1000w HPS on outputs somewhere around 1850µmol/s depending on the exact manufacturer. If we look at for example the Mars Hydro TS3000, which is stated by Mars as being a good replacement to 1000W, it outputs 1095.6umol, but although its less output, its more efficient with the spread and spectrum. In your case if you are limited to 100W consumption, you would have to lose quite a bit more in umol to run a 100w light. An example would be the Mars Hydro TS 600 which would meet your requirements for 100w but it just wouldn't be sufficient to replace 1000w HID. I am currently running a TS3000 alongside my 600W HPS and its amazing to see the power and heat differences. The TS3000 only pulls about 3 amps compared to my HPS pulling at least 6 amps. I would say the TS 3000 is a great replacement of the 1000w if you are able to accommodate more than 100 watts.

Use some salt or rice but they will not do so much. Let the air ricirculate in to the room you are growing. I think u need a dehumidifier in italy now is very humid , i can flower only cause i use my ac to drop down the humidity in the night, in the day i can open the window and the humidity drops down. Hope tu help u, my english is bad tells me if u want some tips in italian 😊💪🏼