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Unless it's dying, let it go until the buds are hard. Flush your medium with a dose of water and see if the white hairs pop out again. Claw symptom is either Mg def or pre N burn, I don't remember exactly. If you use a microbe tea as your flush it will help the medium dry out again. If raising...

Put a drop of water in the jar and put some place warm.

Those roots in the last two pics are clearly not healthy.

Refrigerators are designed to cool a small load and to keep it cool. Not constantly running like the coolers at a grocery store. Chances are the mini fridge does not have sufficient capacity to cool for long periods of time. It depends on the size of the fridge, refrigerant used, the load...

Works like magic

If I remember correctly, fulvic acid is a chelater that aids the breakdown and uptake of nutrients. What does fulvic to to ph?

I need a thermostat that will control a pump. I want to build a recirculating cooler by running copper tubing in the my ventilation intake. Water will be run through a coil immersed in the nutrient solution and then up through a coil in the ducting and back down. During the summer, I won't...

Yeah, so each has its own route to the blower. Do the same thing on the other side other side of the hoods. Basically, so all the hoods connect into one main duct on each side of the hood. I think his would make best use of your intake/exhaust capabilities, assuming you have 12" openings for...

You also want to consider light intensity and penetration. 1k wins.... You will get more, better popcorn from the side branches then you will with the 600. Also, I'd consider less then then 25 plants on a 4x4 table.

1/2" pipe affects the volume of gas that can flow to that stub. If you are only going to use 1 burner or 2 burner generators, I don't think there will be an issue. My oven has a 1/2 stub behind it and I know an oven will use much more gas than two, two burner Co2 generators. Go natural gas...

The fan itself probably makes less noise that the air being blown around.

I would use a 12" Tee(T) and then get two 12"x8"x8" Wye's (Y), two lights per wye. That way the heat distribution will be more even.

Some grammer in your post would be nice :) If your pushing through the lights then no. If you are pulling through the lights then maybe. Unless you live in BFE then I would advice some odor control. You never know when someone will come by and try to sell you magazine subscriptions or...

How high are the lights from your plants? How many plants? How tall are the plants? These factors will affect coverage area. Fire them up and see what works.

Search for"high voltage thermostats". Heat only thermostats are cheap. Heat/cool thermostats are more expensive. You can use a SPDT relay in addition to the thermostat and wire it however you want. Normally open or normally closed.

The only problem with this is if the outside air in your area is dry. You could get a humidifier and a humidistat. Either that or you could spray a few times a day.

Top it and take a clone. That's probably the best genetics in your lineup.

There is a fine line between having a long drawn out post that people don't want to finish and having a short post with not enough info. Your post was long and drawn out without enough info. Stop being lazy and do some more of your own research. Go to the growroom setup forum and read...

The difference is the difference between nodes. HPS plants will generally be tall and skinny with more internodal distance and MH plants will be bushier with less distance between the nodes.