Historically I used 40 gal res for m2 grow space with recirculating, replaced every week, and now I use half as much with DTW (40 gal res for 4 x m2 grow spaces filled 2 times a week (even if I used double the volume of solution it would then be the same as recirc). Again been doing this for a long time and took a while learn the tricks to get it honed in. I do run a custom style few if any use. I get 1.5-2.25 lb per m2 no co2. Use mineral salts, its very inexpensive, give jacks 3-2-1 a go if you want its tried and true
I've no doubts you are a very skilled grower, I just have a hard time visualising how that's working for you in a domain that's new to me.
I'm watering slowly with a wand in 3 passes twice a day soon to be 3x monitoring run off and this is my first coco grow hence the KISS delivery method. I've used home made soilless for years, peat/compost + amendments and done alot better than other guys both product and harvest wise - 1-1.2lb per 600 a m2. Literally "dirt cheap" bud, I even had my own worm farms. At one stage I was growing half oz colas in 2.4 litres (about half a gallon?) in soilless mixes under 400 watt hps at a rate of 36 plants/m2. The older I get the heavier those bags and huge pots get (last runs were 50 litre fabric pots @ 41 then 37 ounces x2 600 hps in 2.4x1.2. Buying salts in raw form is marginally cheaper than making 400 litres of super soil, lots lighter and will last longer.
Aside from wanting to learn more, there's a geographical aspect to this. Jacks 3-2-1 just wouldn't be economical to post to me.
5 litres of premix A-B runs at about $100 and for that price I can have 50% of the base materials I need to put the above recipe together and last a very long time.
