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I have been using Samsung strips with the lm561 diode I think, for 3 years now. Soldering: very good, dropped fixtures and diodes still attached lol PCB: is CRAP. Slight bend and half the diodes dont work any more... Light: very powerful, had to run on 50-60% because plants were struggling...

Hi guys, old school R/DWC grower here who's never flowered in flood and drain. Is it better than DWC under summer circumstances? My DWC grow exploding but roots are slightly brown. Not much of a problem then, but I can't help but wonder if F & D in hydroton will improve my yields in summer...

Thinking about a DTW system where I can reuse the media. Hydroton is preferred here and I can reuse it. Anyone tried this, or thinks it may work or not? OR just flood and recycle the nute?

Im making fertliser for hydroponics and the exact ratios of nutrients to each other are kinda important.

hey guys. My Exodus Cheese plants always complain like this. I think its a mag issue but could also be lockout. Running flooded tubes with water at 20c ie 68f Ec = 365ppm canadian Ph meter out of action

I'm formulating my own stock nutrients. Was wondering is using Calcium Nitrate and no other ammonium salt is fine --- instead of using Calcium Ammonium Nitrate. It's very warm where I live, and I need to cut down my nitrogen levels. Anyone tried this?

Hey guys. Cons Canada: Yes everyone is saying Canada is going to legalise, but others are saying it's going to be a government controlled market, where you sell to them. Anyone else = worse penalties than before legalisation. Also I see SOP licensing seems like a bitch and a half. Cons USA...

I've been using liquid GHE fertliser for years, always had Calcium issues. SO I started mixing my own from salts. Fun. Though I can use some expertise How much calcium is generally adequate for DWC? My plants aren't complaining, yet, 4 weeks into flower, but being optimal can't hurt. Worried...

Doing some safety research. Found some toxicological case reports about Potassium Hydroxide KOH below. From this it seems safer and better to use Potassium Bicarbonate which can be used as an actual chemical buffer against acidity, and isn't a strong base like KOH, which apparently can melt your...

(Reposted from advanced marijuana cultivation. So here is where I think I should post nutrient science.) Found this gem the other day. If you a NPK ratio perfectionist like myself, have fun, just zoom in to read. Been scouring the scientific literature for cannabis nutrient uptake ratios as I...

Found this gem the other day. If you a NPK ratio perfectionist like myself, have fun, just zoom in to read. Been scouring the scientific literature for cannabis nutrient uptake ratios as I am formulating my own nutrient solutions for recycling hydroponic systems. Looked at reverse engineered NPK...

I have noticed from making my own "Bloom" stock solutions last year that after an hour or so that I get a nasty slug precipitate forming, which contained MgSO4 + MKP + KNO3 MKP + MgSO4 in same stock tank or bottle apparently is fine acc to some people, but others (like Haifa) say no those are...

Has anyone experimented using Salicylic Acid (SA) for hydroponic nutrient solutions? There is a ton of good info on foliar application on food crops, and I hear it can make a great chelate/complex agent for minerals, because fuck synthetics like EDTA, which are building up in the environment...

It's quite alarming how some blogs and forums on the web confuse SOG vs the somewhat exclusive "perpetual harvest technique". These are NOT the same concept, though they can be used together. SOG: Involves a uniform canopy of buds, which only should involve plants of the same growth stage for a...

My first real LED build, thanx to the decent info embedded on riu. So I went balls-to-the-wall and hooked up 10 F-series gen 3 (SI-B8T521B20WW), the 4000K ones, to a Mean Well 480HB. Did parallel spidery wiring style over snaky series one, simply because I trust current over voltage. The space...

Active hydroponics requires a pump to supply plants with hydration, duh. But I have killed so many crops that I have pretty good reasons why it happens. Sometimes the fault lies in the machine, but usually fault lies in man. So maybe others too can learn from my fuckups. · Never go a day...

I have the option of less efficient 3000K led or more efficient 4000K Samsung leds. So I superimposed two relative colour spectra. But I see no significant departure between those 3000K and 4000K spectra in terms of 680nm+ relative output. Sad Emmerson. 3000K = RED and 4000K = BLUE 3000K...

Looking at Samsung strips with LM561C for a veg + cuttings box. I figure that colour quality seems to be less important than quantity, generally, but not when it comes to morphology, such as making new roots. I find clones can develop roots faster (1 week instead of 2) than HPS compared to 4K...

The rapid germination of 20 seedlings using DWC: A case study Intro Seed propagation often involves many phenotypes, so 1 of my germination system (previous DIY) was used to billet this stage of growth, to test out that system. Materials: Seeds (16 Banana hybrids; 5 DarkStar; 1 Sour D x...

Accurately constructing a small DWC system for the rapid germination of 20 seedlings Introduction: This project designs and constructs a small system that can germinate 20 seedlings. A bubbler system i.e. Deep Water Culture (DWC), is a simple way to hydroponically cultivate plants. Advantages...