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Here are summaries from my initial use of a BlueLab Truncheon showing the different dilutions.
I followed Peat's mixture for normal vegetative growth in three steps and let it set for 30 minutes or so between steps then measured the EC and PH. Here are my results, very close to what Peat said. I'd trust his measurements any day, just tweak them a bit for your particular crop, truncheon or not. I'm going to try this in my herb garden diluted about 10%, making a full gallon out of it.
Peat's formula, per 3.2 liter capacity is 6.3ml Flora Micro, 10.6ml Flora Grow and 2.1ml Flora Bloom and shows an EC of 2.16.
Starting point, fresh tap water, room temperature - 0.4 EC 7.6 PH
1/3 of his mix - 1.2 EC 6.8 PH
2/3 of his mix - 1.8 EC 6.8 PH
Full strength - 2.5 EC 6.6 PH
Diluted ~10% - 2.3 EC 6.7 PH
I have since diluted this another 10% to get the EC level down to 1.8 and all is looking and growing great.
I mixed up two batches of Peat's Bloom mix for the tomatoes and peppers and the results were surprising. I found a pitcher that holds a full gallon without being filled to the brim so added one other result. Also, I'm using the normal Micro for two reasons - 1. Our water changes and will be changing more as the city slowly integrates Rio Grande water with the current well water. 2. That's all my hydro shop had. :)
Note: This is strictly for my water as it is today, yours will probably be different but there is considerable leeway in the mixes as you can see. The PH buffers in the GH nutrients try to keep a PH around 6.3 but they can only go so far and my 7.5 PH seems to be the limit. You may not know the EC level of your water but a simple tube & drops PH test kit is cheap and available many places. Another note, I don't know how my plants are going to react to this mix so this is all experimental but based on solid data.
Peat's Bloom mix, per 3.2 liter, a full AG bowl - 8.5ml Flora Micro, 4.2ml Flora Grow and 12.7ml Flora Bloom (this is GH's 1-2-3 tsp per gallon mix put in blending order and scaled down to fit)
Starting water - 0.4 EC, 7.5 PH
1/3 Peat's mix - 1.2 EC 6.5 PH
2/3 Peat's mix - 2.0 EC 6.4 PH
Full mixture ---- 2.7 EC 6.3 PH
+ 10% water - 2.5 EC 6.3 PH
Full Gallon .... 2.3 EC 6.3 PH - YES!!!!!
This was so nice I removed the tomato deck, did a thorough cleaning - roots were 3" past the pump filter and replaced the mix. One note - I met some resistance lifting off the deck and saw it was roots growing around the the crossmembers so I removed them before completely lifting the deck.
I have been waiting about 30 minutes between mixtures, giving the PH buffers time to work before measuring but found they are immediate and don't change so I sped up the last two measurements.
Then I mixed another gallon with the same measures all at once, stirring in between ingredients and got exactly the same readings. Nice!
Later - My tomatoes are thriving but I noted my peppers yellowing just a bit. Feeling lazy, I added one ml of Micro to the bowl, bringing the EC level to 2.5 and they are greening up nicely. My next pepper brew will be the full, undiluted 2.7 EC mix.