First DWC

Having done many earth grows and some Kratky experiments in the past, I felt confident to try RDWC. During the germination week I already noticed that my experience was not worth much. I sanitized everything with Isopropyl alcohol because the H202 was still in shipping. I'm using tap water with an EC of 0.4 and pH of 7.2. I set up the system with drip rings and dropped the seeds with a bit of paper towel directly in the clay pebbels. I set the pH to 5.8. I would not do that again, it would be far more efficient to use a Kratky setup beforehand. Without any nutrients I already had problems getting the pH stable. It ranged from 3.5 to 6.5. However I got it fixed in time and both seeds popped.