Bru honestly why would you want a PAR meter? Not worth it imo, rather spend that on a good PH meter or a humidity or temp controller. Also with regards to running it 20/4 opposed to 18/6, plants use the darkness to grow, so yes even tho more light is good, the balance of 18/6 is great because they have 6 hours to do their thing. Sent from my G3312 using Tapatalk
Filter connected as so
<= Fan |--- Hood --- | <= Filter <== Air flow
I prefer to use the filter as the first line and pull vs push. (When i used an air cooled hood)
Since the prizes involve autoflowers... All images posted below are from my auto grows. A combination of photos from an Ogre autoflower and Jack Herer autoflower.
Would he need to add more calmag to the Freedom farms soil? I personally havent had any issues with my current FF grow. But could be different for higher wattage grows?
I don't think you'll achieve worth while growth with the added 2 hours. You will also be saving overall lifespan of your LED and on the electricity bill should you go 18/6.
Don't forget to monitor the colour of you plants in actual sunlight. The LED's aren't great for viewing plant colour. I've also noticed that my plants require more CalMag under the QB vs COB setup.
Update and Maintenance:
I looked at the garden this morning after enjoying a nice wake n bake session and thought about how I can give lady more sun. I whipped out the garden tools and started cutting away.
I placed a piece of leftover pallet wood in that area and it fitted perfectly. It also allows me a nice platform to stand on and sit during maintance of the plants. I gave the lady a last minute LST and now she is enjoying more sun and lifted from the ground.
Just a very very early pic of pistils starting to show. I know.... Its useless but yeah..