Mint Jelly and purple haze in 2x2

sprouts were fully up on Sept 23, so I'll call today the first day of week 3. Precipitates were building up in the tanks, plus I only had sampler sizes of the Lotus nutrients. In addition, a couple of smaller burn spots showed up on the lower MJ leaves. Thus, I bought an Advanced Nutrients kit and used 10 ml/gal for the first round. I didn't ph the water kind of on purpose just to see if it still worked. I am using an RO filter, so the water is 0 or 1 ppm to start with. The MJ looks healthy, but it's got smaller leaves and is also twice as tall as the PH. there were a couple of small fertilizer burns on the oldest set of leaves, but the plant stabilized, grew immediately, and now looks incredible after the nutes were switched to sensi grow. It's maybe 3 inches tall.