@luxton I have to extend my sincerest appreciation for you writing your message to me. Immediately below is the message as I had initially written it, then you’ll see where I get to the point where my thanks becomes relevant.
Yeah! I was pleasantly surprised at even the rapid change overnight.
Room RH is 50-55% on average. The tent keeps a fairly steady 55-57% (depending on how I have it set).
Perhaps foolishly, I’ve been experimenting with using the exhaust fan to keep the RH steady, and the light intensity to modify temperature and thus VPD. Due to the low humidity in the lung room, it means the exhaust fan isn’t running constantly, but like takes gulps of air here and there (basically).
Doing it this way lets me keep the transition humidity set so if there’s a particularly humid day, and my basement dehumidifier isn’t keeping up, it’ll run the fan as much as is needed to keep the RH as low as possible. I do have the internal clip fan set to run at a pretty high intensity to keep air moving around.
I remain fairly committed to getting through the grow buying zero other environmental controls (humidifier, in-tent dehumidifier, separate A/C, etc). If I end up needing to keep it more humid in the tent so the fan can run more constantly, I’ll uncover the hydroton. Now that I have the 30 gallon reservoir, I have absolutely zero concerns about the EC getting too high from rapid evaporation.
Will I regret this experiment in some way? Quite possibly! We’ll see!
I decided that I should add a picture to give a comparison to where it was earlier, especially since it’s almost lights out. Ran downstairs, noticed that the in-tent sump pump kicked on, which isn’t necessarily abnormal, sometimes it just does because water has settled against the sensor or something.
Opened up the tent and saw that the plants looked surprisingly similar to 24 hours ago, worse than my earlier photo. Also noticed that it smelled REALLY different than normal, very much like wet dirt. Pulled the plastic off the hydroton, it was extremely wet, which it hasn’t been even when pulling off the plastic. Opened up the panda film skirt to check the sump tub and the drains, noticed water coming out of the drains. It was 30 min until the next feed, the water should have stopped draining about 15 min after the last feed, which was an hour and 45 min earlier. Cue alarmed face.
Realized that somehow with my modification to the reservoir last night, apparently I changed the angle of something enough that it wasn’t breaking the siphon when the pump turned off. Which means that very probably, it had been basically an NFT or RDWC system for the last 24 hours (or thereabouts). So I went from at least 2 days of NO feeding to a WHOLE LOT of feeding. That might have been why they looked so much better 12 hours later?
Got it adjusted hopefully enough (will check it again after it should have finished draining fully). And hopefully it hasn’t COMPLETELY fucked it up now. Decided to leave the bins uncovered so they can dry back more fully overnight in the dark. Also in writing the earlier part of the message, I had mostly decided that would be a reasonable way to keep humidity and thus airflow up.
I am so incredibly glad that my system held up! The bell siphons worked as intended*! The sump pump system worked as intended! I have no idea how much water actually flowed through the system since it started. I would have been very sad if the bulk of the 30 gallons had ended up on my floor.
(*since the flow siphoning in from the reservoir wasn’t as fast as when the pump is running the drain could stay ahead of it at least enough to prevent overflow)
So anyway, here’s the pic I took after dealing with all of that! And THANK YOU again to luxton for inspiring me to take a picture to include with my response.
Sad again