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Looks like heat stress. You need to get the humidity up, and/or the res temp down, and/or the air temps down, and/or increase watering intervals and/or reduce the fan speed while you are under extremely dry conditions. What climate zone are you in? Not all of the things may be practical for...

You have a mg def. With the lilited info you provide, I can only tell you to supplement with Cal-mg @ 5-10ml/g Kind

Cheers, that is all I did this run, usually I run HG complete line. After 1 week down, I can already see a difference from not using Roots Accelerator :( Too me that $70 for the 250ml bottle is well spend, but I'll give it a view more days before I add it back in.

Not to be too hard on their progress though, they do look like they did quite a bit of growing for their first week.

I'm re-thinking my Base nute experiment lol. It is still early on, but it seems that with the Roots Accelerator the plants pic up faster. Could be wrong though, they were a bit banged up when I got them. Usually I would see roots coming out the bottom of my pot at about 1 week in from clone...

Yeah, well that is exactly what I'm trying to establish. Roots Accelerator runs $70 for the 250ml bottle. I usually use hg's complete line with good results. I would rather use a complete base nutrient if such a thing exists. HG advertises on their site that Aqua flakes is a complete...

Woooohooo, that is some niiiiice bud there brother!!!

Hey, any of you guys just run Aqua Flakes A/B? Kind

So I made some adjustments yesterday. I went 'sealed', meaning there is no more ventilation from here on. With that decision came the obvious next one, I started to add co2 at a low rate, about 800ppm, along with the air filtration. They are getting 3ml/g a/b and 5ml/g cal mag (RO) along with...

Cheers OGP & lakewood, good to have some guys along :) If you guys have any suggestions or concerns, don't hesitate, let me know. Kind

That is the look of a happy well fed plant :) It will need a pot pretty soon.

Just to clarify, we do not cool with fans. Depending on the fan and room size we can bring the grow room temps close to the temps that the room has from which the air is being drawn from. That is it! For cooling we need A/c. We can remove heat with a fan, but we can't cool. OK, now that that is...

Easy breezy brother. Check this out: http://hydrobuddy.co.uk/acatalog/In_Line_Fan_cw_Speed___Temp_Control.html Kind

Waiting waiting waiting :( The first 2 weeks are sooooooo slooooooow......... Well, I guess I go smoke one!

Depending on how big your resis are, 1/2 hp chiller will most likely be overkill. So, you can certaily cool 2 or 3 resis with it. There is a easy way to cool 3 resis running different nute formulas with one chiller, but it gets a bit complicated, and will require acurate sizing of 3 seperate...

Cheers Muffy :) You are correct, if we only need 400cfm but get a 800cfm fan for example, then the added back pressure from pushing vs. pulling would not reduce air flow below our required 400cfm. It will however reduce fan efficiency dramatically as well as cause premature failure of the fan...

Can we get a pic of the whole plant mate, along with your grow info would be great ;)

Break up some mosquito dunk and sprinkle it over your soil (no worries here, it does not affect your plants). Take the rest of the dunk and mix it with your feed water. The gnats will be gone:) I used to have terrible problems with gnats, a guy told me to put a dunk into a nylon sock and keep...

Cheers Muffy, the 'back-pressure or static pressure' you are talking about is actually a limiting factor as it relates to total cfm moved. Heat always moves from hot to cold, meaning that hot air in the hood corners will not be isolated like you might think. The more cooler air we get accross...

We don't have to try, the science is settled on this. Kind