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Down to Earth sells big bags that are organic certified. I would assume the cheap version is GMO/petrochemically grown/herbicide fields etc?

Rain water, dehumidifier condensate and R/O are all in the same boat, completely missing calmag. I use both R/O and rain water and I am grateful that we dont have city water here. In addition to fluoride, chlorine and chloramines, tap water may deliver "emerging contaminants" of primary concern...

The main thing I see wrong with that soil is, it critically depends on the quality of those castings.

Random stuff -Growstone went out of business and I am seriously missing the Growstone GS2 recycled glass for aeration. It is a lot stronger than perlite so it doesnt break down in recycled soil and its the perfect size and density. I have enough to add a bit here and there if needed and take...

Here are some of the results from 1:1 slurry test with a Hanna ppm meter. I was surprised how low the numbers were for composted horse manure and forest EWC. I got them from the bottom of a forested slope under a crab apple tree. I suspect that the person who I got the horse manure from probably...

The golden rod smells awesome and apparently the galls enhance the fertility. I feel like a weirdo going out there to collect them but if you can get access to some power lines or fields that are clean you will find lots of them this time of year. Im just mixing in bins for now, great exercise...

Needless to say, it was a HUGE improvement. The ladies were able to feed much better and I was able to crank up the lights more. Much better yields and much better quality buds. I am still experimenting with the strength of the compost and the ratio of rinsed/amended. Right now it is about 1:1...

Still running the same soil but last year I started to run in to problems due to lack of runoff (my runoff worked its way up to 5000 TDS). So I took ALL my potting soil (9 years of use and reuse) and rinsed it thoroughly with rain water at 5ppm. About 15 gallons of water for every 5 gallon...

In my experience, comparing the same cuttings and same soil, potency is related to canopy temps especially in the final 4 weeks of flowering. This is especially true with heat sensitive varieties. HID bulbs radiate an IR spike into the canopy which probably results in more vegetative growth and...

Facebook marketplace you can probably find one cheap. It does add heat to the grow tho so if necessary you may want to run both AC and dehumidifier. I range between 50-80% humidity by cycling dehumidifier, outside air and AC during the warm season. This year I built a dry box with carbon...

That kind of makes me feel better that yours eventually went through. Payment stuck in Detroit since July 18th and Im jonesing for some Useful and Bodhi flavors. Crovid days

I recommend dimmable fans (hyperfan style) on the carbon filter so if it gets too cold in winter you can turn fan power down as low as 6W to keep more of the heat in the room and still keep negative pressure to keep the smell routed through the carbon filter. Also using a high mounted...

DNA absorbs 254 nm UVC which makes UVC awesome for germicidal lamps, killing germs in water and air filtration systems. I looked at the product ZGE285-12UVC_B and it is 280nm and 310nm, so essentially it is UVB just like fluorescent tanning lamps, reptile lamps and the bright noon sun. You...

Kapton tape has been able to hold the weight of the COBs and the cables against gravity for many years, as long as applied correctly. That said it can be ugly and it was intended for "temporary" installs and it annoys @stardustsailor so next time I might try using UL metal tape. But there is...

Yea not much use for 5000s. I use them in veg but I figure if theyre hitting 223lm/W at 5000K thats probably 210+ on 3500K? SI-B8U051280US 3500K 197lm/W 12" 5W $7.42 not bad I could retrofit a few onto 16" heatsinks. Might use $7 in thermal paste too tho LOL. Might try hair wax as super cheap...

Cutter always has some crazy shit! On of the first places we ever found top bins back in the day, thank you Mark! Im guessing they make LED tanning beds with UVA UVB nowadays? Def be careful with UVC germicidal spectrum though, hardcore DNA damage. UVC normally gets filtered out by the atmosphere.

Wow 5000K 223lm/W I like the sound of that. Yes the change from 2009 heatsinks to 2016 was a big step forward, sounds like we took another big step if they are really hitting those numbers ! I still have and use these 2009 heatsinks but thankfully times have changed. These original leds were...

THNX homies, glad to see you guys are keeping up on the R&D! Reading the data sheets on the Samsung strips now...