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I think the issue is both pH and buildup of nutrients. I lowered the pH of my water to about 6.1 as I noted that my pH of the water was about 6.5. I did not think about checking the EC of the runoff and as soon as I started checking I could see this is a problem. The EC was initially 3000ppm...

Been two days after turning the blumat down and the coco is drying out nicely.

Yes the root zone is pretty wet. Ok will add watering to the list and dial my blumat down.

Flushing made the issue worse. My original assumption was over-fertilizing. This assumption appears wrong. So it could be underfeeding but also could be sulfur. Looking online a foliar spray of epsom salts and giving a feed at the right pH seems like the best option.

Iam growing Dutch Treat Cbd. Growing Medium Coco Ph 6.3 Nutrient better Bloom (12:34:12) with Cal-Mag. About 30 days into flower. A week ago I observed nutrient burn (dark green leaves and burnt tips) so ramped the nutrients from 1300ppm to 400pm and flushed excess salts. The concern I...

Just discovered this thread. Fantastic work. Gives me an easy tool to monitor decarboxylation and test oil extractions.

Agreed. Best method to decarb. Decarbing as oil or glycerin solution would produce a better product than dried herb. Decarbing oil also easier to monitor. Skeptical of Decarbing herb because you are heating a herb and this result s in higher oxidation potential due to increased surface to air...

I just went out and bought one of these (https://www.amazon.ca/gp/product/B003OBYNBO/). They pull a pretty good vacuum. I use it to remove the majority of my solvent before putting it on my vacuum pump.

I doubt it. The lipids tend to form an emulsion in ethanol and do not separate out like they do with oil and water.

Yes the majority of the terpenoids will boil off a lot earlier. However, your limonene, linalool, geraniol and similar terpenoids will contaminate distillation. It all depends on how good your distillation is. A good fractional distillation should get the product pretty damn pure. I know...

Id be certain. Id agree some oils could distil with the THC/CBD but I dont think those would be stopped by dewaxing. Lipids/waxes are bigger and higher boiling point. Distillation using the right chemical glassware makes it easy to separate the waxes/lipids from THC/CBD. The biggest contaminant...

You only need to add enough ethanol to dissolve the oil. More than a few drops (1-2mL per 5g). My setup is in the thread https://www.rollitup.org/t/bho-how-i-do-it.979106/ My end product is a relatively thick oi/l so does not pour. I use a chemical spatula to scrape the oil I need if I need a...

Assuming you are talking about short path distillation. Dewaxing is not necessary as the waxes and lipids do not boil anywhere near THC and cbd

The method I proposed would not remove the lipds as they are not volatile. You are distilling the residual butane off. If you have a good vacuum pump and right container you can remove ethanol at 30C. I use round bottom flasks to store my oil in. This makes it easier to attach a vacuum to.

If butane is a concern you can take the final oil and dissolve in 1-2 ml of ethanol (95%) per 5g of product. Then remove the ethanol under vacuum. The worst you will end up with is trace amounts of ethanol. Because ethanol is higher boiling than butane it will be removed first.

Very interesting. The solid would likely be a lot more stable than the liquid, at least from my experience. Curious what scale you did it on and what your yield was.

What are the bags made of? It looks like nylon. https://www.calpaclab.com/nylon-chemical-compatibility-chart/

I go by how sticky the butane mix is. Wearing gloves of course Color is not reliable for me as mine start pretty pale.

I have a preference for using finely ground and completely dried bud. You get much more in the tube and will probably go through less butane. Just make sure you start the column with some course/barely ground bud. It acts as a filter and limits the amount of fine stuff you get in the product. I...

6 cans for the 190gram run and 4 cans for the 95g run. The Durban poison had a lot more cannabinoids per gram than the early amnesia. That was more a function of my growing than the plant.