The only thing I could find was a soil with very "minimal" nutes - exactly (.09 . 04 .06). I am using filtered water with a minimum of 24 hour before use. I adjust the filtered water with PH-up and PH-down - made for spas/pools. I just checked the soil (runoff method) and water and it is in between 6.5 and 7.0. I'm going to try to go back to regular tap water - PH adjusted.

Peat puck sounds like a good idea for the next grow but I wouldnt mind saving these ones. I have one plant of a different strain (feminized Fire Hydrant) that is doing rather well under the same conditions (soil, water, and lighting). It's showing minimal signs of yellowing but is not "full on" like the other two.

Thanks for any feedback.