To me it looks like algae, I make sure to use a shop vac to remove all the excess water from trays about 3 hours after watering. This can help a lot with preventing fungus and mold growth as well.
Also I noticed someone mentioned a wick bucket, I used this before and it worked well for humidity, I ran into a algae and fungus problem cuz I was lazy and didn’t change the water in the bucket or the towel. I simply added a bit of hydrogen peroxide to the water, 2oz/gal or so to sterilize stuff and didn’t see a return of the green scum.
I made a heater years ago for my garage grows using a 300 watt aquarium heater immersed in a 5 gallon bucket of water. Kept the lid on and set to 85F and blew a small fan across it. It was inexpensive to operate and bumped temps up about 5F in the grow space. Cheap too. @Not2SureYet did something similar.
Very good idea.
So i may as well add this suggestion to the mix
This humidifier also gives off heated “steam” or non heated.
It’s not going to give alot of heat but could maybe raise temps some while raising humidity at same time…
Get the controller too. It takes all the variables out bro, best $20 I’ve spent. It works like a timer just runs off humidity levels instead. I like the Vicks hot vapor humidifier, just keep it back from the plants a bit and obviously don’t put Vicks in the cup lmao
La Kush Cakes- regular seeds - 4 days into flower, they vegged for 50ish days till they popped preflowers, both were super cropped at 2nd and 3rd nodes left plant was topped twice and the right one was topped 4 times and I let it stretch for light more than her sister. They have their own lights both 200w led one is vander life and other in linqool kinda testing them to see who does better. I’m also doing another one under a 32w Home Depot fiet electric full spectrum that says it has the same dli and ppfd as the others. We will see lol
much better numbers, in my case with the humidity over 40 it takes a bit longer for my soil to dry out, so I have to water less often.
