Zombie kush dwc

Week 1 Seedlings are growing very fast and seem pretty healthy, I did have a problem with leafs twisting and curling and I found out my ph was slightly off ( 6.5). So I cleaned both dwc buckets and added new nutes and water to both , I had my water level 1 inch up my net pot and that is what was causing my ph to rise rapidly, once I lowered it to 1 inch BELOW my net pot the ph riseing stopped also I’m useing RO water because my water out of my tap is a bit to hard to use ( high ppm ) Thanks for reading , cheers fellow growers 🌱