Hi all, Good to be among you. I have recently decided to grow my own medicine. Stealth op in a walk in closet. I chose to grow using DWC. I have 2 Viparspecter 450s and am currently growing rogue seeds from some Jack. Over the past few days there has been a development of powder around my basket holes. I dont think It is WPM, I think it is tap water junk. So I ordered a RO sysytem. Gonna get it all right with this rogue jack and then start some Blueberry Auto I ordered from True North. But If anyone has any Info or advice about the powder I would appreciate your input. I scraped some of the powder up and looked at it thru a microscope. It is a brilliant white substance with high light reflectivity. I painted the grow room with flat white paint and let it dry for 3 days before hooking everything up. Have steady humidity and heat, plenty of circulation and ventilation. Im wondering if it is paint dust or maybe fluoride or calcium from tap. Anyhow thought I would say High and Introduce myself. Happy growing !