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Thanks for clarifying that for me. I use Roots Organic also with very good results. And I aerate it to provide nutrition for microbial life. I add mycorrhizae to my soil, and teas for feeding. Someone wrote that this was a conflict. I thought fungus and bacteria in the soil were desirable. Now...

Interesting YouTube video. ISO standards, and UN methodology. I think I am speechless on that. Since the US is fatally behind the curve on cannabis, I am not surprised that you have to get your best info from international sources. Marijuana is a very dangerous drug here in the US, you know. LOL...

They are both substandard for pH measurment. But if I had to choose, I'd use the strips cuz they are easy. The liquid colorimeter test IMO is a pain in the... pH pens are really cheap these days...

These are killer brownies. I've added conversions for substitutions. Double Chocolate Fudge Mint Canna Brownies Do you like Thin Mint Girl Scout Cookies? Ingredients: Baking spray 2 ounces unsweetened chocolate (or 6T cocoa powder + 2 T canna butter) 1/3 bag semi-sweet chocolate chips (1/2...

Agave syrup is finding popularity, as it is not as sweet as corn syrup. Plant based.

Yeh, it's pretty dismal down here. A lab could get a relatively cheap license to test other analytes on the GC/LC to offset the cost. Or take a loss till the market grows here. Labs are an expensive business. Some of the Organic Standards are over $100 a pop. Usually, they need more than one...

We are a municiple lab, not a private lab. Read in govt. (99.9% are internal process samples) We are hoping to hookup with a start up that can obtain licensure. The market is growing here. The last dispensary that I talked to was tired of shipping and paying the $45 per strain, per grow. etc...

Dude, we don't know that he is unqualified. He hasn't responded since we posted. Give the guy a chance to respond. The lab I work for is licensed by the state, has frequent external audits from ADHS, and has QAQC program that oversees internal audits. I know this because I audited them...

You posted links to the specification manual for the initial instrument set-up, and a study. What method will you use? EPA 600? What standard will you use for cannabis? Calibration verification? We use a LC MS in our lab for organic analysis. As for the post about the gas altering the...

Results will only be as valid as the QC you are using. I assume you know this as you are spending a lot of money for this project. I would be interested in how this works out for you. Cannabis testing is non-existent in So. AZ. Will you be licensed with ADHS, or are you roughing it on your own?

I toss the stones into an old 1 gal water bottle with Hydrogen Peroxide and soak them till the next brew. Every few weeks when the crust builds up, I toss the stone and replace it with a new one. Add fresh H2O2 every few days. Replace the water every couple weeks. Tried cleaning, PITA. Stones...

Purchase a reputable calibration solution(s) and follow the correct procedure. Stay away from distilled water, milk of mag, vinegar, cola, etc. during calibration. pH testing can be very delicate. You have spent good money on a meter, purchase the proper solutions to get it right. I've covered...

Love Sour D. SnS is a killer. Ours was more SAGE than Sour. Killer cough.

I grew this strain out. Gorgeous plant. Great taste. Medicinal. Props to Subcool on this one. This one is "private stash' for reals.

I tend to be more worried about the neighbors smelling it than stinking up the house or my clothes. Run the fan while smoking in the bathroom, or smoke then run the fan. That the latest debate in my stoner head. Gonna try the dryer sheet idea. I use incense currently, but air spray sounds viable...

I've discussed pens, meters, temperature, calibration, cleaning, and just about everything that has come up. Click on this thread and check it out. https://www.rollitup.org/general-marijuana-growing/701733-lets-talk-about-ph-testing.html?highlight=lets+talk+about+pH+testing That said...

It's a leafhopper. Get em outta the garden. If they find their way into the flower room, they will lay egg sack in the buds. When the buds dry they will crystalize. Looks like brown sugar when you crush the buds for a bowl. Very gross. Don't want to smoke that crap. A regiment of alternating...

Firstly, remember that pH is considered an 'immediate' test. That means you can't let it sit. It is meant to be added and read immediately. Add the drops to achieve a color change and take the first reading. Don't let it sit for 5 or 10 minutes and try to take another reading. The time will...

Firstly, remember that pH is considered an 'immediate' test. That means you can't let it sit. It is meant to be added and read immediately. Add the drops to achieve a color change and take the first reading. Don't let it sit for 5 or 10 minutes and try to take another reading. The extra time...

He knows a 'little' about teas. He offered no explanation for his objection. Now I'm confused. I aerate my gro/bloom nutes with kelp, humic acid, molasses, and whatever else is needed. Humic added after aeration. I have not used compost because I have no source for it. I dont strain, just mix...