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Orenda Technologies | Proactive Pool Chemistry Can also be used to calculate SH, if people need to use it in a pinch.

EC is EC, doesn't matter how you get there. RO+calmag+fert at 500 is the same as well water+fert at 500. As long as your final solution is in the ballpark of 100N-30P-120K-80Ca-40Mg plants will be happy.

I don't know if this is your first DTW grow, but here are some basics. Don't water in small amounts. When the media is very light and just barely damp, water to 20% runoff and dump runoff immediately. The top should be dry, but you should feel a little moisture if you stick a pinky finger down...

You could throw some aragonite (crushed coral / mollusk shells) in a fine media bag and toss that into the rez to buffer.

You need carbonates in your water to buffer, so I would go with the K2CO3.

I grow everything in professional peat mixes now with 3 part dry fertilizer. I find it very simple to use the buffered mixes. I mix up a few barrels of nutes a week and the timer pumps into 1/4 sprayers every morning. Price is very reasonable, the local agricultural supplier charges about $25 a...

I think it's the type of media and amount. Bark mix will be heavy and hold lots of water. You also have a lot of it for a small plant. I've found doing drain to waste you want full dryback in 1-2 days. If your plant is sitting wet for 6 days, you need to lighten the mix with perlite and/or use...

Two words....Hydro Buddy.

You could also add a no nitrogen calcium source like calcium acetate or calcium chelate EDTA. Calcium Chelate – Miller Chemical

It depends on conditions, but I have found its almost always a good idea to hollow out the middle for the airflow. I have lost most of the yield on 8 footers because mildew started in the middle and took over the plant. That was outdoor in New England with our lovely humid fall weather.

If your looking for a lower N formula for flower there are Jack's 0-12-26 and MasterBlend 4-18-38.

I've set up a quite few novice people to grow and the ones that did peat soilless usually fared better than soil. "Put X and X of this into 5 gallons of water and every second or third watering dump it on the plants." For some of them that are sorta the gluehead type I might even weigh out a few...

I picked up a few bales of the Advanced with coco....I can't tell the difference between the Advanced and the all peat version.

Spin to win! I only hand trim the very top colas for jar appeal.

....In this day and age, when $20 won't even buy a burger plate and tall beer at your local pub. For us old farts that still like to spend cash, Twenties just burn up to fast.

If someone is looking for a cheap pure acid for pH down why not use muriatic acid? It's made by bubbling hydrogen chloride into deionized water. The final product will always be a pure solution of water, hydronium and chloride.

Jack's Finish doesn't have the extra micros the 5-12-26 Base has, since it's meant to be used as a one part fert.

The 3 part Base/Calnit/Epsom type fert would be my choice. Everybody makes it now, Jack's Masterblend, Southern AG, GrowMore, ICL...etc. I would just use whatever is local and cheapest.

Progressive Grower has a location in Islandia, I use the one in Wareham, MA all the time and they rock. I call ahead and they build the pallet. Then I pay cash and they drop it on my truck. Soluble - Progressive Grower