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Get a humidifier and get them Temps up.

I am for them. Part of the nute regimen. Jacks's 321

Looks nice and you drying great. What strain/genetics?

Well not sure about your nutes as I am not familiar with them, but I would get your Temps up to about 82-84F with an LED.

What nutes and what light source?

You are under LED? You need your Temps closer to 82-84f, and your humidity closer to 50% rh for flower.

I would say at least 3 weeks. Most of the pistols should be brownish and receding. Don't stop feeding either. Keep good air circulation going throughout the entire grow. You got this, and looking good so far. Keep updating this thread as the days go by. Be patient.

I am assuming you've probably read up the differences between HID and LED growing? Temps and humidity (VPD) are more critical with LED in my experience.

I just started monosilicic, as my first foray into SI, and the label says to add last or you will get foam. I didn't read the label and added first and got foam. It may just be the brand, Growgreen Monosilicic, but....

With LED, temperature and humidity play a much bigger role than with HID. You need Temps in low to mid 80's, and an appropriate humidity to have a proper VPD. Once that is in the correct parameters you can focus on nutes and light intensity, but not before.

Please keep documenting your process and results. Hopefully someone here has been through this and can offer some tips. Do you have airflow such as fans available to keep the air circulating? I'm indoors in a northern climate so I will not be able to provide much assistance. Wish you the best...

Wish I could help. Don't know much about spores and such. What's your environment like?

Whew, that takes me back. ;)

For the Passive intake use some 3-4" pvc pipe with pantyhose wrapped around the end. Help keeps bugs out and doesn't restrict airflow.

Say about a month if indoors, but since you arent.... depends on weather.

Doing more research it appears the Grow Green monosilicic acid I use has a wetting agent in it, which causes the foam I am seeing in my res due to RO water and possibly a higher pressure pump. GG recommends their product be added last to help prevent foaming. On another forum there is thread...

You still have white pistols coming out. 3wks, maybe more.

I will see if I can. I know the pump has an adjustment feature.

Well checked with strips and everything is perfect. PH is 5.87, EC is 525. Outside res cryatL clear, inside root chamber is foaming.

New revamped system. Had it running for 2-3 weeks to be sure no leaks. Once happy I started with a low dose nutrient regimen of 1/8 strength Jack's 321 for initial feedstock. The thing is the res outside the tent is crystal clear and looking great.