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sorry - th thanks - that's 80 F water

You got to make some effort and quit whinning... google and read it.

Bravo, You are absolutely right on the money again, you got it. The difference between air and O2 is 20% O2 and 100% O2 respectively. At sea level the gas tension of 20% O2 in air is 152 mm/hg and the gas tension of 100% oxygen is 760 mm/hg. Now it should be easy to understand how 80% water can...

Oh No, Try, try again, if you still can't get it, go to college. I found plenty on info.

Yep, you are absolutely right when the limiting factor is air - air is the problem that limits oxygenation when you need more O2 or DO in the water.

Give me a break, make a little effort.

But how in the world can you increase the Dissolved Oxygen without increasing the fractional concentration of O2? Without increasing the fractional concentration of O2, ambient air with any and all combination of air pumps, waterfalls and aquarium chillers is a costly meaningless exercise if a...

Here's a real sad but real true deal. Mother Nature has got you on the air deal, salesmen know this and have their little hands in your pocket preaching their myth… buy “hope,” it’s only money. My 8th grade General Science teacher taught me the difference between air, nitrogen, argon and oxygen...

what does this particular tea really do, why all the sugar in it?

Grow Hack: 5 Facts About Dissolved Oxygen http://www.hightimes.com/read/grow-hack-5-facts-about-dissolved-oxygenBy Sirius J · Tue May 05, 2015 Serious J links this article to new equipment that oxygenates RDWC and POT cultures with pure 100% oxygen produced with simple electrolysis, and then...

Quit the whining, grow up and stop wanting everything for FREE like a lot of people in America - in the mean time quit your poor me, show me, free food mindset. Here's FREE boy... gfy and your Mama too. J

Here you go krypto - If you never have low O2 problems, don't waste a second of your time even reading this. Warn the water with something like this - Submersible Aquarium Heater, Glass 300-Watt, for Freshwater Aquarium and Saltwater Aquarium, Jetsu's New Range of Aquarium Supplies...

qwizo - Thanks tuning in and offering your opinion. J

There is no doubt that I have encountered a truculent “know-it-all.”

OK Krypto - just for you I'll "lay it out" 1 more time.. you must really make an effort this time, try to stay focused and pay attention. Do you think the plants may be healthier, grow faster and be more productive if the grower could maintain his nutrient solution and root zone temperature at...

Krypto – I would turn down my A/C thermostat if the air temp was uncomfortable, to high, but that will definitely increase your electric bill (your cost of operation). Great calculations with the DO chart, different temps, etc., but you are omitting a real important parameter that hydroponics...

Sativied - I read some of your Picture Journal, I’m looking forward to reading it all. You’ve provided detailed technical information, references and technique along with great pic of your work. Clearly you are no novice in the trade. Intellectual Honesty is duly noted, has validity...

Krypto - Is that the only 2 reasons for not using warmer nutrient water that you know of... lower dissolve oxygen saturation in warmer water, warmer water guarantees low dissolved oxygen saturation and low oxygen saturation increase probability and chances of root rot fungal infestation? I...

Everyone I've talked with all say the nutrient temp must be kept between 65-69 F, but when I ask that simple question - Why and show me any research that tells me why... I hear "look at our chiller advertisement," "chilled water is great for your plants, your plants need and will love chilled...