Browny purple leaves

Anyone any idea what's up with this plant?

In hydro rockwool slabs
Week 3 of flower
Ph of 6
Ec 1.45

I have had a mite issue which has just been treated with mighty wash about 3 days ago. I have also been using isopropyl alcohol to control them.

Likely phosphorus deficiency. Are you mixing the alcohol with water?

hotrodharley said:

Likely phosphorus deficiency. Are you mixing the alcohol with water?

Click to expand...

Yes... It's 70 percent ipa, and I'm mixing it 5050 with tap water.