Red Poison: Sweet Seeds

somewhere within this time frame I repot up to 5L. I added around 1/3rd more perlite to make sure my drainage was good and lots of oxygen to roots... I've read too much internet crap by this point and am terrified of everything drastic happening to my poor little plants. I cut open the 1L pots and see loads of roots.. I mist them with a spray of Voodoo Juice, Tarantula, Piranha and a few drops of SuperThrive..... The plants must love it because they grow like the hulk within days and I start Low Stress Training.... By now I am an expert internet reader but still cannot figure out why I have a Calcium issue!!!! I am perplexed.. There are tiny rust looking spots on some leaves as if they have the measels, but not all leaves are effected. ..... I changed from Distilled water to tap water. Filling my old distilled water jugs ( 4L ) and leaving them open in the grow room to dissipate chlorine. Tap water PH is 7.8 and 170ppm to start with. Advanced Nutrients when mixed in takes it down to 6.2, I then further the drop to 5.8 with a few tiny drops of PH Down (phosphoric acid)