All references are in the description.

Dá uma olhada no open salts wiki que tem clone de algumas fórmulas comerciais: opensalts.wikidot.com/ Tem também essa página no Instagram que posta algumas fórmulas: instagram.com/diysalts

Yes. Its a example ratio for cannabis.

@@kromalabs thanks, that's way higher than I would ever dare go. Very interesting indeed.

It works for any medium as long as you can tell the moisture content every hour to 30 minutes or so

2-4% of the water volume content during the "dry back' of the substrate. This is best displayed using substrate sensors that deliver the info in a graph form on a phone/tablet/monitor.

Shot size for Vegetative 1-3% and Generative 4-6%. The dry-back between shots for P1 in Vegetative 1% and Generative 2-3%. In P2 Vegetative 1-3% and Generative 3-6% .

Muito obrigado pelo apoio!

Eu que agradeço pelo apoio!

Soil sensor or a bit runoff just to measure. Runoff is not a problem. The main goal is target the dry-back.

Rule of thumb from rockwool is each irrigation volume, called a "shot", is 3% of substrate volume for vegetative & 6% for generative. For flowering, called "generative" double the time between shots and start the irrigation cycle 2-3 hours after lights on and stop 2-3 hours before lights off to promote greater dry back and drive EC up.

@@kurt5490 thanks for the info brother. what’s the best way to get the substrate volume? With a brand new cube should I just measure how much water(ml) it can hold or should I soak it first then let it dry due to salt channels before I measure to full to saturation?

@@Htown_Rocket90 For rockwool you're using the entire volume of the cube to determine shot size. Ramsey suggests using field capacity as a starting point for all other media. A pdf that really helped me is found at www.netafimusa.com. Use their search for Precision Rockwool Applications.pdf. On the pdf's 2nd page. There is a list of most of grodan's rockwool sizes and lists their 3% shot volume in milliliters. There are also 3 short paragraphs that give general guidelines for using rockwool. They contradict some of Ramseys points he makes in other videos. Ramsey uses math to determine shot size to achieve a certain level of saturation during lights on. But increasing shot size during vegetative growth may nullify any crop steering thru precision irrigation. Increase the # of shots , not shot size. Increased shot size is for generative growth. Until proven by experience, I'll use the pdf instead of Ramsey's suggestions. Perhaps I didn't hear him say one or the other. He's a smarter, more experienced man than I am, but I'll reserve final judgment for myself. I hope this helps and answers your questions. Kurt

always at the end of P1

The recommended shot size for Hugo blocks is 3% of its volume = 100 ml / shot. In case you want to lower the EC quickly you should raise the volume to 200 ml per shot.

@@benn1555 100 ml.. is that right? if my math is right then that would take about 33 irrigation to get to saturation point and i dont think anybody is feeding 33 times lol

@@tee228 The Hugo block is 3.2L (100% water content) 15cmx15cmx14.2 (6x6inch). When you initially saturate the block by submerging it has to weight around 2.7-2.8 kg which is around 80% of full capacity water content (80% of 3.2L). during cultivation you work between minimum water content 40% maximum 65-70%. Example in the morning water content 50% equal to 1.6kg (theory) in reality is 50%of 80% 1.4 kg, but Grodan make calculation based on 100%. so 50% WC equal 1.6L you want to increase to maximum capacity 70% (it will drain at this level or even before) than need to add 20% to reach this level . 20% of 3.2 L is 640 ml, so in order to get drain you need to give either 3 irrigation x 200 ml or 6 irrigation of 100 ml. Same result. Once again to reach drain level (no saturation), you need 3-6 irrigation in general. Hope is clear.

@@benn1555 thanks for the detailed reply 👍🏼 ill need to read it a few times to truly understand lol also what would be a reason to want to lower the EC as u mentioned before?

@@benn1555 hey man, usually what is the dry backs before the first irrigation? i watch that Ramsey said its half of the field capacity is that correct? I mean from the last irrigation to the first, my media weights should be in half?