Are you sure your water doesn't contain chloramine (different to Chlorine), that will not dissipate by leaving out it needs removing. I had quite a few issues using biobizz soil and nutes too, but seems your pH is ok. Thing is, there is a formula to follow to work run off out that makes it more accurate do you know it? GoAuto sent me this:
Rough Calculation Guide:
Here's some good info on ph.....
If your runoff pH is higher than your starting pH, use this equation to determine your soil pH:*
Soil pH = Runoff pH + Difference
If your runoff pH is lower than your starting pH, us this equation:
Soil pH = Runoff pH - Difference.
For example, say your the starting pH of your solution before it goes in is 6.5 and the pH of your runoff is 7.0. The difference is +0.5, so using the above equation:
Soil pH = 7.0 + 0.5*
Soil pH = 7.5
If your starting pH is 6.5 and your runoff is 6.0, your difference is -0.5 and using the above equation:
Soil pH = 6.0 - 0.5
Soil pH = 5.5
Sorry if you already knew that.
I forgot if it's allmix or light mix you are using, but they are both loaded and in light mix I think you can get away with 14 days with no nutes and allmix around 21 days. But that is all strain dependant.
You have slight tip burn on some of the leaves from what I can see, that is usually overfeeding, crinkling on the edges leaves - can indicate Ph problem.
Sorry to throw that out there, but I learnt the hard way (still am) that too much of anything is just as bad as too little. Something to think about anyway bro.
