Clones not rooting, never had this problem before any advice?

I have a little 2 site bubble cloner I made and have successfully rooted about 20 clones with it since I built it a few months ago, but these two i have now (GDP and banana hash plant) just wont root. Its been 2 weeks now and they are just sitting there going nowhere. My ph is a solid 6.5 i check it twice a day, i've added a small dose of hygrozyme, a bit of superthrive and a bit of hormex and its on a heating pad that keeps the water at 80 degrees. These 2 just don't want to grow roots! They look healthy and aren't showing any signs of stress so I don't know what to do. any ideas?
 

Attachments

  • IMG_1041.jpg
    IMG_1041.jpg
    39.6 KB · Views: 6
  • IMG_1042.jpg
    IMG_1042.jpg
    38.4 KB · Views: 8
Back
Top