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Update: Looks like it was a nutrient lockout due to incorrect ph. At first I tried to lower the EC and when it didn't work I tried to raise it as instructed by drsaltzman. I monitored the progress for a week or so and the problems just continued and worsened so I bought a proper PH-pen. PH...

Interesting. I thought that when I check the ph when I mix the nutes and later check the runoff and they are both fine I'll be good. I will be investing in a quality PH pen tester to get more accurate readings and take them more frequently in the future then.

I have two SANlight EVO 4-120 lights. Currently dimmed to 60%. https://www.sanlight.com/en/product/evo-4-120/

I'm hesitant to up the feed when the runoff water last time showed EC of 2.4, even when the max I've feed her during the veg has been 1.4-1.5. What could cause such a difference? Also, I can't really understand why the PH is so stable while the EC swings that much... And as far as I understand...

I've been using a drop ph tester. While it's not the most accurate tester, I know that the value is above 5.5 and under 6.5 and the closest color I get constantly is pointing to ~6. The nutes are stable and I've used more or less the same amount of ph down to get to that value for years. I test...

I don't see things getting better. More leaves are starting to get rust spots and I don't see much if any of that healthy darkish green color. I think I'll just flush the reservoir and start from a "clean slate". Only questions is, should I play it safe and give them say half the nutes as...

I've raised the lights up a bit. Raised the daytime humidity to around 60-70% RH PH is ~6 and EC is ~1.4 Added some CalMag Yellowing is still continuing and some brown spots starting to appear on the leaves. I really don't have a clue anymore what could be the problem. Gonna wait a couple of...

I took a daily look at my remote surveillance feed and noticed this development on couple of leaves. I can't access the site in a few days to take a closer so wanted to ask your opinion about this. This setup: Barney's Farm Critical Kush, about a month into veg 4x4 tent Full spectrum LEDs with...

I just wanted to report that I've been using two Sanlight EVO 4-120 for about half a year now and I've been really impressed and happy with them. :blsmoke:

It's a plastic container, not 100% airtight but closed nevertheless. I've added some extra weight on top of the lid to help the top stay more tight on the sides. Regardless, at this situation, it not being 100% airtight would be a good things as the humidity in the room is much much lower than...

Living in a really low humidity climate at the moment. RH is around 20-25% in the room where I have my grow tent which I also used to hang the weed to dry. After 5 days of hanging (the nuggets were crisp to the touch, some stems a lil bendy but others snapped) I put the weed into a 22 liter...

Very good read indeed. Thank you!

I was using 600W HPS in a 4x4 tent (never measured the PPFD from it). Now I have 2 x 255W SANlight leds that give me around 500-800 PPFD (depending where I take the readings) according to my not so accurate meter on my android phone (PhotonE). Will have it calibrated in the future for better...

My understanding and experience with different bloom "enhancer" / "booster" products that usually consist of sugars and/or molasses and fulvic/humic acids is that they increase the size of the buds a little bit and improves the taste and increases the amount or trichomes (by either giving the...

Sorry, I think my post was unclear or confusing. I'll edit my post for clarity. I only use hydrogen peroxide in hydro. My plants started to bleach ONLY AFTER I made the switch from HPS to LEDS. I had *never* seen bleaching on my plants while I was growing with HPS. Again, for clarity: I'm now...

Hello, tiny bit of background: EU based, English is my 3rd language so excuse me if my writing is not easy to comprehend. I have experience with growing in soil and hydro. I have used only HPS before and now I'm doing my first grow with LEDs. I've also switched from soil to only using hydro for...

Yeah I run DWC. Getting tired of using the drops tbh. Old habit from from my soil days; I just check the PH when I make a new batch of water+nutes and only double checked the reservoir ph when problems had already risen. I want to stop slacking and put more effort into the dwc setup I now run...

Looking for opinions on the Hanna HI98129. It has replaceable probe and and it's reasonably priced where I live (EU).

The dude on my local growstore (quoting from SANlight brochure I'm sure) said that The EVO 4-120 lights on 4x4 don't need CO2, but if I would go for the 5-120 lights (already overkill for my tent) which according to SANlight are not designed to use in tents but rather commercial grow setups with...

Nice find, thanks! Somehow missed that even when I was searching for reviews of these lights on Youtube/Google