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[GhettoStyle]

Bro are you here? I have a question for you, I remember you saying that your solution concentration at this stage will be 1200 ppm! bro, what did I do? I drained all the rastovr and filled in the water, leveled the pH! so I thought that the pH drops every day because the concentration is too high! but now I understand that the pH drops every day due to lack of concentration! I tried 650 PPM - 750 PPM and the pH is still falling today I did 900 PPM, I hope the pH will stop falling! What do you think about this?

[GhettoStyle]

Sorry! But you misunderstood me, I was referring to the water temperature in the DWC! And you're talking about the air temperature! Yes, I keep the air temperature in the tent at 25-27 C and the water temperature at 20-21 C.

[Rootsruler]

I understand that weed advice is like assholes. Everybodys got one but my post advice comes from people that I have been able to verify are knowledgeable, experienced growers. Many are licensed operators with staff botanists so I give their advice more creedence than I would someone that I have not been able to verify.

The temp advice I gave comes from a RDWC expert out of Canada that is a licensed operator. We were discussing how water temperature affects oxygen levels in the feed solution and someone in the discussion mentioned that they were taught that water temps in RDWC should be on the cooler side, around 68°, because cooler water will hold more oxygen molecules. My Canadian RDWC guy commented that, while theoretically this is true, oxygen levels in water will dissipate quickly trying to equalize with the existing air pressure in the air so oxygenating, while it does help, isn't quite as effective as some think. He actually tested this and his results were as he stated. Yes the water had a higher concentration of dissolved O² but it was around 2% - 3% higher than normal standing water.
He also commented on how applying too much air into the chamber will affect EC and pH levels. This is why he says that while oxygenating your water with an airstone is a good idea it's not providing as much O² as, say, fogponics where the roots are suspended in air and being misted constantly rather than the roots sitting in water relying on the O² levels in the water. He said that he too was taught that cooler waters meant more oxygenation but he said he experimented with higher res temps and saw no detrimental side effects in regard to plant performance. He reported that he found increased growth with higher air and root temps. His only comment was that with the higher res and room temps you wanted to keep an eye on crown rot but he said that he's only experienced it once and he felt that it came from another source rather than res temps.

I'm a dirt farmer with just enough DWC grows under my belt to be dangerous but the advice applies across the board. Laboratories have confirmed that the ideal leaf temps for photosynthesis are 77°/25C in almost all plant species. The only time that would change was if the plant originated in an extreme weather area where the genetics have adjusted to the climate but for cannabis all the landrace cultivars that have been discovered have been found in a fairly tight grow zone so, for the most part, cannabis knowledge can be used almost across the board when growing it.

If you are still in doubt look to CO² growers. They typically grow in temps hovering from 85° to 95°. Higher temps faster growth as long as the rest of the stats are in range.

[GhettoStyle]

I read about the temperature of the solution! That's why I bought myself a water cooler! in the articles, everyone writes that the temperature of the raster should be 20-21C and that I am advised 25C, so this is already the limit of another couple degrees and root rot! That's what you're advising me! Yes?

[Bluey]

Lol. You've come to the place for the best advice available on the internet and a grower with dozens of years experience just gave you a clear answer which is based on the most recent available research and evidence and you ask if he is joking?

Is that the correct approach?

You can also do your own research online and if you are a student you will also have access to literally 1000's of research papers published by universities and other industry bodies and organisations. Many of these are peer reviewed, some are break throughs in the sector and have changed the way we grow,, some are complete rubbish. Many are also available to the general public.

Additionally, if you read the tutorials on the GWE website you will find the answers to almost all your questions and the problems you are experiencing.

[GhettoStyle]

Are you kidding 25C? Are you serious?

[Rootsruler]

Ideal root temps are the same as ideal leaf temps 77°/25C

[Bluey]

I know nothing about any of the ferts or suppliments you are using...zip

[GhettoStyle]

Today I changed it again, added 100 cal-mag and the nuts all came out at 460 PPM.

[GhettoStyle]

Probably compatible! It seems like Cal-Mag should be compatible with third-party manufacturers! I am using Cal-Mag BAC 2.0
What do you think about Canna and BAC fertilizers?

[GhettoStyle]

what is the ideal temperature for roots of 20C degrees?

[GhettoStyle]

[GhettoStyle]

my Cal-Mag BAC 2.0 it is compatible with my fertilizers Canna Aqua Vega
There had never been such a drop in pH before! maybe I accidentally changed something!
And which fertilizers would you recommend Canna or BAC or some others?

[Bluey]

The pH will drop if the calmag is not compatible with your base nutes. It will go off and after 7 days stink. Your plants will die if that is the case and you don't get onto it.

Are they compatible?

[GhettoStyle]

There is no debris from the roots in the bucket! I have already replaced the solution, added 100 ppm cal-mag and 100 ppm fertilizer, the total ppm came out 300! so the pH drops after that too! I think it has to do with fertilizers!because of them, it looks like the pH drops and the plant itself lowers it, but I don't understand what needs to be added more fertilizers?