Weedhound - Thanks for the replies, the local water store is closer than the local 711, so it's all good I am going to do as you said and add in 500 ppm of ProGrow, then dilute it down to 400 total. After that I will ph adjust. Finally, I am going to foilar feed with some Pure Blend Pro Grow at 7ml/gal.

How does this sound? I hope my girls will appreciate the work I've been putting into this, although it's all my fault for any yield sufferings :P