Bought this for Dawg's solo cup comp in 2018 or 2019. Lately I am using it to grow radishes with excellent results, starting a new tray every 2 weeks. They like a hot soil similar to cannabis. They start out 17" from the light then finish about 14" from the light. With a good soil mix its water...
I posted it might be genetic earlier. I'm guessing the majority of the regular troubleshooters aren't touching this post because they aren't sure what's causing it.
Maybe if you post some good pics of the overall health of the mother plant you put in flower that you took the clones from and...
No one is going to know what you're asking here with no information.
I posted early on in your other thread suggesting the problem might have been too much light, right now you are heading in the wrong direction testing the ph of the runoff. That is not the way to test soil PH.
Yellowing tops can be caused by too much bloom food too soon. Not the case if you haven't fed it with anything other than what you mentioned.
Another cause can be too much light. How close is your light to the canopy?
Have you changed the distance recently allowing it to be closer?
Others will...
Another issue could be PH if you haven't added dolomite lime or oyster shell flower after a few grows.
Soil PH drops over time and needs to be checked.
If you're going to continue reusing soil a $30 soil test will show if the soil is deficient or at toxic levels and will include a PH test.
I agree with the others that the plant is over fed and has a salt build up.
There is a lot of mis information circulating about soil growing. The salt build up does not happen for growers that buy fresh soil each grow.
Soil does build up salts if reused and never leached of the buildup.
There...
An evaporative cooler holds a couple gallons of water and simply pumps it to the top and gravity runs it through a filter. Air is moved by a fan. RO water and regular cleanings keep it running well.
I have one similar to this...
I was going to suggest the drops.
Rainwater usually tests below 7 ph. It is only in rare locations in the world where rainwater tests above 7.
The drops will give you a more accurate result.