You got it goin' on for sure, mate. Looks really good. Your 'cardboard mulch' is great. With SIPs you learn these little tricks that give you back some control. Sometimes my plants say, "yo, help me dry out a bit, huh big fella?" so I pop off the 'mulch-cover', like yours (actually, I recently moved up to using old grow tent material, mylar) and it works great. Sometimes it says, "hey, yo, I can take some more juice" or, if I want to stretch out the between-fill time, I start slowing the evaporation process by installing the mulch, the 'mulch-cap' as I call it, in addition turning some fans down, or off. Doing this I'm able to almost double the time between rez fill-ups, if necessary.
That said, my totes have a larger surface area topsides when expressed as a ratio to overall soil volume. That is, larger than the 5-gallon pail's topside: soil volume ratio, so your mileage may vary.
It's helpful to develop and practise these controls, and keep 'em in your back pocket ready to deploy when the mood or the need takes you. Let me know if you develop any new ones, or just ideas to toss around. I'm always looking to develop some SIP understanding and controls.
I absolutely love growing this way, just love it. It was so fun to learn about it myself, and it really really sharpened my otherwise piss-poor grow game. Usually, people who've heard of it think that it's just a way to get out of having to water properly every day, but that's obviously a mistake. These plants grow faster, stronger and cleaner than all but one or two other methods that I'm aware of, and they are still competitive with them. Plus, how many super-speed-grow methods are there where you can do either Living Organic Soil, or synth-salt fertigation, soilless -- with no fuss, no pumps, no... nothing?
The plants look epic, I hope you grow Christmas trees as Buds Bunny does, but whatever floats your boat. I know you got some good genetics in there and I'm really interested to see your progress. So, thanks for making the effort, I really enjoy it.
You're using the Grow Dots, yeah? Did you pick up their recharge too? That stuff is top-notch, really is. They're selling SIP setups now too, he became a quick convert like everyone else, and his SIPs are 5-gal and pre-plumbed in the best way for immediate or eventual attachment to a gravity-feed auto-filler w/ control bucket.
Anyway, thanks again for the 'share', the plants look very good to me, very SIPpy, Best to you and yours, -RD