I don’t do metric.ppm is what I use in North America doesn’t matter. I don’t know about your setup. 35 gallons you must be doing 7 plants? Doesn’t matter because I do know root rot lol trust me. If you don’t clean every week you’ll get it.usually the last of weeks of flower and your plants...
It’s fine your a week into veg. Bubble some h202 diluted about 50/50 (or flying skull) with cool clean water for an hour a week . The bacteria is always there your just setting it back too much to grow by flushing with cleaner
And it looks like you threw a full colony on top of more substrate and then fruited.... its upside down. Those shrooms are using memory to grow and you can can see they ate tryong to correct themselves by turning up.
Dont vent into the dropped ceiling....... holy crap.
Can you tap into a bathfan or dvent?
If anything get some 2-4 inch Thick blue board insulation and cutan 8-12 inch wide strip. Cut a hole big enough for exhaust put in window . Problem solved. Or t into dryer vent
I would suggest returning all of it and going in soil. Smells better and so much easier. Hydro is best for large grows with round the clock supervision. You cut a week off veg and can grow monsters but its too much work and costs a fortune. First time growing in dirt and im never going back. Got...