I run hydro on my tables and I have to run chillers, got 2 decent size res’s and have a Haliea 150a 1/10 HP on each, target 20-21C. Did res changes this afternoon. My RO water was 28.5C out of the drums when I pumped it in. Will cool over a few hours to target temp and maintain from there. Keeps good DO levels, n hard for the nasty’s to grow.
Yeah I also ran a Hailea (can't recall size) chiller when I ran the 12x 20L RDWC system.
Like you said, when water is the medium especially, you've got to keep DO levels as high as possible.
Man I loved that system, built it from scratch from thread on Overgrow, it fucking rocked for it's day.
I ran the Lucas formula in it. Had a great air pump that made those things buzz with bubbles.
Grow rates, plant health, all best I've ever had.
Plants were just too big and immobile with all the drain & feed & air lines.
I fucken hate that.
I like to be able to move my shit around.
It was so cool seeing the day to day explosive growth of bubblers in early flower.
I'd open the room after dark period and think holy shit wtf happened in here lol