Right at 3 weeks old, PH stays at 5.8-5.9, ppm around 350, water temps creep up to 74-75 but try to keep them close to 71 (best I can do for now) Ppfd is right at 400 with the light about 18” above the plants. It’s only the lower leaves doing this. Thanks for any help!

After battling root rot extensively and not having much luck with beneficial bacteria products, I am considering moving to a sterile reservoir following this guide: https://www.reddit.com/r/DWC/comments/m8llra/sterile_growing_method/

My tap water has a high pH (around 9) and I currently use phosphoric acid to lower pH. I have read that phosphoric acid should not be used with calcium hypochlorite as the two chemicals can produce a toxic gas/react poorly.

Is there an alternative pH down option to use when running a sterile reservoir? Something that won't react poorly with calcium hypchlorite?

pH: probably acid EC: 20 x 10^5 (more or less) 20 hours of led light Very acculturated as it’s in the chemistry department of my university

My plants are growing but they seem to stay small and aren’t producing large leaves. Any advice would be appreciated. Thank you

The literature says 36* is the low threshold but this is the second year it’s been wrong. It was cloned from the base of store bought head. 👋🏼

A few weeks ago there was a flurry of articles online about black plastic food utensils having flame retardant chemicals in them that could leach into foods.

Is this a concern for hydroponics gardens?

I have a very special interest in regenerative living. I feel very blocked with multiple things.

I find that sustainability keeps speaking to me and Permaculture design principles.

Really looking at Vermi to Permi culture as ways to help with goalsetting for independent living.

I’m looking for mentorship and mentee ship opportunity .

I have skills that I want to hone and teach others however, I could use some moral support and guidance.

Looking to make a lettuce farm on a 3-ft wide by 1- 1/2 ft deep shelving unit with four shelves spaced 18 inches apart.

They have the white recessed lids with clear tubs looking to go with a 4-in AirStone and a 5 volt water pump with a crude aeroponic setup.

My thoughts are four plants per tub which would give me approximately 6 in spacing.

I need to buy 3 ft LED lights so any suggestions are welcome.

Hi I'm growing my alocasia Frydek in hydropon and since I put it there it's always been covered in white fuzzy mold... I know it not bad for it but I don't love it and I'm a bit afraid of cinnamon which can be toxic for roots if used excessively... I can change how much I water the soil because of curse there is no soil and water has to be always there... what am I supposed to do? I place it outside every day for air circulation but it's useless and I can't afford a dehumidifier right now... any suggestions please??🙏🏻

Any idea what it could be? Mineral salt buildup? It occured a day after putting hydro nutrients in the water (Yara soluble nutrients). I used to have dwc System and this didn't occur, now it did on most of the neg pots.

The outside temp is 0-6 Celsius, in greenhouse it is 5-20 (in the morning I open it for ventilation so temperature drops). I have an aquarium heater set to heat to 20 degrees Celsius so it works all the time essentially. Stil have to measure temp and pH/ec.

I have my RDWC system that just arrived. I am finishing out my last soil grows.

What are some tips that you wish someone would have told you when you started?

As title says, I feel like these ladies are healthy for the most part aside from this discoloration so if I can fix it that'd be awesome.

Hello everyone, I want to build an automated hydroponic system where I won't have to do anything, the machine will do it's thing. But the problem arised in measuring the pH of the plants. The convinient pH sensor(for arduino)doesn't work in the long run, the probes become unusable after few tests. so is there any other way I can constantly monitor the pH?

Beginner here. I'm planning to buy some dimmable grow lights, currently looking into these (link in the comment):

item:

• QBX850Pro-DIM 85W 30*30cm OR
• QBXK1500Pro  85W*2  30*30cm*2pcs (seems like the same, but 2 pieces with 1 driver)

Example driver specs:

• OUTPUT: DC68-82V 1200mA

I want to have these lights remotely controlled (dimming) via esp32 board. If possible also on/off via esp32, but smart plug is fine as well. Would be nice if I could use the same esp32 to control multiple drivers independently. That is supposed to be integrated into Home Assistant.

From my understanding, there is a potentiometer (knob) installed in the driver that controls brightness which I can replace by some esphome compatible module and connect that to the esp32 board. Or maybe take the light panels separately and use a different driver that can be easier modified.

Could you please help me:

• identify what modules do I need
• pinpoint to some existing projects that would work with similar driver
• any other grow lights with similar parameters, in same form factor (thin rectangular board) that would be more suitable for a such modification (aliexpress is preferred due to pricing and EU location)
• get any other valuable information I need for this project

Thanks in advance!

I know these posts are annoying, but this is my first hydro grow and I'm feeling a bit lost. I'm growing cannabis plants and am seeing very light green coloring on new foliage (darker close to veins). Clearly a deficiency, but I feel like my parameters are within what they're supposed to be. General growth and root development seems to be good.

I'm growing in an RDWC system with constant aeration. I'm using filtered tap water with a ppm of 130 before nutrients. I'm using an a/b nutrient product from Vivosun. I have calmag available, but have not used it in this grow at all.

Am I supposed to exclude my base water PPM when tuning nutrient levels? Is this just a case of "add calmag"?

PARAMETERS:

PH 6, PPM 729, EC 1.46

240w LED, 18" from canopy (~550ppfd), Light Schedule 18/6, Avg Temp 74f, Avg Hmdty 65%, supplemental CO2 piped in from beer brewing fermentation.

https://preview.redd.it/1chvd8jcbp0e1.png?width=854&format=png&auto=webp&s=72b2fd96eef9f8908119b425ac1814ac08cbe314

https://preview.redd.it/jirtdolfbp0e1.png?width=856&format=png&auto=webp&s=568e4d0df2ea8522ee0ca180875e616092ec678b

New small brown spots on leaves

Why don’t hydroponic nutrient mix’s come with calcium and magnesium? It seems like this is one of the biggest issues with deficiencies when growing plants and I’m curious why it is an additional ingredient to be added.