Are You planning to automate the process ? I'm using 5speed manual controller and I've got that one
https://www.ebay.co.uk/itm/SILENT-FAN-SPEED-CONTROLLER-VENTILATION-HYDROPONICS-/170283484665
Don't think they make it anymore as I recently wanted to get the same for a friend and couldnt find it.
Watercooled fixture went out and new light setup came in.
10x
FB24B 3000K strips on 2x
480H-48b drivers.
Same power (~960W accouting for driver losses) with better spread. No extra pumps required and all heat stays in the tent. Simplier system means less of a chance of brakedowns.
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And some smaller improvements to the system. Smaller drippers with one extra dripper per pot so I will be able to water more than 3 times a day (1min timer limitation).
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...and new mixer in nutrient tank instead of two small pumps. A bit overkill but hey... I like overkill
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I did experiment this round and didn't do defoliation. It was visible that in this setup, where canopy isnt that thick (~30-40cm max) , light can penetrate all of it and defoliation isnt necessary other than some odd leaf plucking.
Pure coco worked better than coco+biochar, but mix was heavy so i might try it out again at some stage.
Drip clean + Megacrop + CalMag (canna) is causing nutes to separate. Will stop using drip clean and only do cleaning after each round. Instead of liquid calmag I will go back to using Epsom only. I think plants reacted better to Mg+Sulfur only.