Photos before fan leaves trimmed off. Temperature a bit low. About 70F so set up a oil fin heater underneath the passive intake duct into outer room so it warms the air passing over it before in-line fan intake of inner room. Should be enough…still pretty cool here over night. Pumping approximately 35 litres of nutrient solution into the room per 12 hour light cycle with a little run off…they’re starting to get pretty thirsty! And using approximately a lb+ of co2 per 12 hour light cycle. A bit of fine tuning and a co2 meter would see savings here but for this crop I’ll just stick to the current plan…a co2 meter will be on the list before next one.
Photos after the trim. Removed string also as it seemed to be doing more harm than good. Probably installed it too late in veg and too high above plants. I’ll use stakes to hold up heads as they stretch.
I’ve noticed over the last 2 reservoir fills I’ve had trouble keeping pH down. I haven’t let chlorine evaporate from the start, just filled reservoir, mixed in nutes and tested then put lid on. I looked in to chlorine and it’s effects on reservoir control, and just finished reading an article on chlorine and how it reacts with organic compounds, particularly humic and fulvic acids. I’ve just started adding a fulvic acid compound to the reservoir. So I’ll be no longer using it in reservoir. Possibly with distilled water and nutes as a foliar next crop. Interesting read anyway… https://manicbotanix.com/disinfection-in-hydroponics-root-disease-prevention/
Yeah that’s what I have read since looking into it. I don’t think it’s too bad here…I can’t get a ppm reading off tap water and I’ve tested it and pH around 7.5-8.0 so can’t be too bad. It just seemed odd that all of a sudden I had pH rising. Only thing I did different was add an organic fulvic additive. I’m going to drain reservoir and refill with tap water, nutes but no fulvic additive. See how it goes then. If I had space to fill a tank and treat the water before filling reservoir I would but I’m pushed for space a bit. Thanks mate.
It’s just a liquid additive technically. No more steps in it than adding bottled nutrients. Just add it first and let it mix in then continue your normal mixing, I got a pretty big bottle for only 18$ on Amazon and its lasted me almost a year
Thanks @Beerus…so is it like an aquarium type treatment? I’m trying to remember, haven’t had an aquarium in many years, but I would have to treat the water if it tested hard or soft…which is salts? Chlorine salts I presume? I might have a look at the water utilities website, see if they have an analysis on there. (Believing the analysis to be truthful if they display it is a whole different topic ) Either way I’ll definitely look into your suggestion.
You can actually ask the water department for a recent test evaluation if you can’t find one online , it’s their job to provide us with information on what’s in our water we drink and use.
Yeah its pretty much water treatment like you would get for an aquarium but it was made by microbe life ( a nutrient company that’s big on microbials and biology ) so it’s more tailored for cannabis
Run out of co2 3 days ago. 10kg cylinder and got about 10 days out of it. Flow meter had a tiny leak where it connects to reg so that would of vented a fair bit of that. Anyway upgraded to 22kg cylinder. Should see this grow out, I would think.
Starting to stretch a bit, still have a fair bit of room above them but. What humidity levels do people try to stick to? Mine are rising too much as i shut fans down when co2 in room. About 40 min fan off after co2 then 15 fan on. Might need to invest in dehumidifier. Around 50-65% I’d be aiming for?
) Either way I’ll definitely look into your suggestion. 
