I like the idea of having a rez tank system though cause im a lazy bastard.. id have to read more if i could mix up large amounts of nute solution that i could have ready to last a few days to a week an then run a pump an timer with drippers or something, make life easy as fk.
How often are you cleaning out the trays on ur dtw sytem. If ya could run it off straight out into another drum or something be the go.
There’s a probably a few different ways of doing it with coco for dtw, like what reza’s doing just the run off into a drain, which is easy if you’ve got a floor drain. Another one is using tables (like F&D tables) and just having the run off drain into a catchment tank under the table and then getting rid of that. Or something like what I do for my mums in a tent, use a deepish sided tray / floor liner and raise the fabric pots up a bit so they are not sitting in any run off (you don’t want them sitting in the run off), and use a boat bilge pump that has a float switch on the floor of the tray and that pumps the run off out to a drum, empty the drum in the garden as needed. I dilute the runoff for the garden or lawn.
If you like the idea of having a res and doing a recirculating system then probably flood and drain is the easiest hydro method to use. If you size the res properly and use nutes specifically for recirculating system, like canna aqua, you won’t get huge ph or ec swings. That’s what I’m doing atm, went back to the KISS principal so I can actually leave for a few days or more if I want to. Got a 220 litre res under each 4x4 table, and do res changes about every 12-14 days, depending on how much the girls are drinking. If you know what you’re doing you can get some pretty awesome results with F&D.