Wow man I forgot to respond and now im back researching what you've taught me as I am blueprinting for the next run coming up soon.
Lets begin ! now Im more confident in your grow "jargon", I understand what you're saying now through the heavy research.
Under double ended HPS @1000w , plants in 20 gal containers and I've upped the feeding to 3 gal a day because even 8 hours later they're bone dry. Run is coming close to an end , Ive cut down 1 room so far , great weight, im not to happy with quality... After what I've learned now on coco coir as well as how the environment plus C02 enrichment helps... we have to do things differently.
I also have a 22 light
Gavita 1730 LED room that we have plants there full life cycle , I prefer the LEDs but those were a learning curve like crazy.
My plan for the next run is to measure PPFD from the beginning instead of eyeing everything at every stage. To run up our natural gas C02 up to a max of 1500PPM , this im still reading on when the correct times to up the levels are. I will be putting a sauce run off collector because as of now we only have them sitting on risers because remember... strict old school "if it works, it works" senior bosses. So I convinced them to let me put the plants on risers AND saucers, giving me the ability to either feed more freq or until runoff to ensure saturation.
You stated with C02 enrichment you can really push your RPM, this is also something im learning about to maximize my grow. I can't seem to find tons of resources other than Dr.Bruce Bugbee and an article from Michigan University saying with 1500PPM of C02 you can push your temperatures up to 86F, with that being said im assuming they mean LEAF SURFACE temp and not ambient room temp... as under HPS you are emitting that infrared heat which will heat up the plants. I unfortunately cannot switch to smaller containers , but I was allowed to add (1) 10 gal container under the HPS as a RnD to show them what it can do compared to 20 gal. In our led room all the plants are in 10 gal containers. I had a rough time with these bc of the learning curve man, when I learned properly it was already mid flower :/
To summarize the questions
1) What is the optimal leaf surface temperature with C02 enrichment ? lets say ... 1500PPM
2) With C02 at those levels, how would that effect EC targets, feed frequency ?
3) Would you recommend any kind of amending to the coco to keep more moisture to stay on par with the once a day feeding im restricted to? That way I can make sure the coco isn't bone dry by the time I get to work, we all know that messes with the root zone EC and salt build up
4) on another thread you say you water till runoff even at seedling/early veg, this goes against most coco growers and even Dr.CoCo on cocoforcannabis. Can you explain why you do? I was under the impression you need to let the roots search for water as the medium is big but the roots are small, risking suffocating the roots
Thanks for all your work into the community, I stumbled across your posts / comments often. Here attached are also some photos you asked for