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That's what I ended up doing. I do have a valve core removal tool too.

@MrStickyScissors I thought that was it, but the tips of some of the leaves are almost completely yellow. @hells canyon genetics I didn't think copper as it's supposed to make the leaves darker. @Bud Tipps Could be zinc I suppose, I'm leaning toward sulfur. I'm using dynagrow foliage pro at...

Rockwool, was pH'd proper - runoff matches the pH of the nutrient solution. temps: 80, co2: 1200ppm, ~50watts of LED per sqft, Iron deficiency, sulfur deficiency, or zinc deficiency?

Yeah the numbers will depend on your rounding, and what conversion factors you use. Just gets pretty close to the original. I think Silicablast actually is potassium and sodium silicate or whatever. Similar deal with Calmag by botanicare. MSDS lists both magnesium and calcium from nitrate...

Ok, so now you made me do the math. It's 2% silicon. 7.86lb a gallon marked on the original bottle. That's 0.1572lb of silica per gallon w/w, or approx 71.45g, which gives 0.0189g per mL of concentrate. Add 5mL and you get 94.38mg. Divide by 3.7854L per gallon and you actually end up with...

@diamonddav in particular. Had a schrader valve leak when I let the charge go. It's been operating well enough except when I bring in an extra light or two and then my indoor coil freezes up. I'd bet my horse that it's a low charge from when I lost some refrigerant when first setting the...

Ok so according to MBferts 5mL of silica blast per gallon results in a 30-35ppm solution of silica (plus potassium). You can purchase Agsil 16H through them or other retailers. It is 24.64% silica and 26.89% potassium. So how do we make our own gallon of silica blast? Get a gallon jug and...

I completely understand that with greater efficiency more light is created with the same amount of watts and less heat. Whatever light outputs the most PAR most efficiently up to and including the maximum amount of light the plants can absorb over the most evenly spread canopy will be the best...

I considered hempy, but it's not feasible with the table being so large and sloped to drain. Ok not hempy, but a few aquavalves on the bottom. For my moms I have a 4x2 tray I made also with pondliner. 5 gallon bucket houses an aquavalve. The plants are in ~12x12 square pots filled with...

I'm not going to have a lot of room to move them around lol. We're talking about 3" between the slab and edges of the tables and then 6" between the slabs themselves. Will have just over a plant per square foot. Also, I don't think humidity will be a problem. I run a minisplit and with all...

@bluerock From just cursory research it seems that ATA Clean works better than drip clean in keeping drippers from clogging and I was planning on vegging two weeks once in the slabs/cubes. @Aeroknow Coco slabs? I can find the .25" mats but even with the expansion the rockwool seems like it...

I'm throwing in the towel. First grow try I got stunted growth and lots of problems. Roots stayed white with bleach. Doser kept over dosing from the set ppm. The only scientific explanation I have is that the chlorine combined with the ammonium to form chloramines. Nonetheless, the free...

from fully rooted clones. I leave them in the propagator for about two weeks and they've got long roots by that point in rapid rooters. Right now I'm thinking 36" rockwool slabs with 4 4" blocks per slab. Put a half gallon drip emitter into each one of the cubes.

So I was looking for some input on this idea. There's not a ton of information on rockwool drip let alone drip to waste that I've found. I have a 6x12' table with a 2 degree slope to drain made of wood but lined with pond liner. There are some small areas of puddling which may or may not be...

What about using the rockwool cubes on a coco mat with a sort of NFT flow going over the coco?

I was wondering before I tried this out if anyone has tried 4" rockwool blocks on top of a .25" coco mat where they just kept the mat wet. Would the rockwool wick enough from the coco mat? I ask because it'd take 50 gallons of water to go to 1" depth in my tray and I'm not keen on getting a...

So now I'm leaning towards quarter inch coco mat on the bottom with the 4" rockwool sitting on top of it. Over top of that will be rigid foam insulation to prevent any light leaks with holes cut out for the rockwool cubes and then a small piece of plastic sheet to keep the light from hitting...

Also, I'd like to start them in rapid rooter trays, then move into whatever medium I choose. Currently I'm thinking 4x4 rockwool cubes. The PITA is just getting rid of them after each grow and also PHing them before the grow.

I need some input on a redesign idea. I tried using HP aero (albeit longer mist times) and I've lost two crops to root rot. My first idea was to switch to a system like my mothers where they're in a tray filled with an aquavalve and sitting in pots filled with perlite in holes cut out in foam...

Why is this thread still going?