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Well where do i start.....First off having major issues with ph for two weeks now...constantly adjusting PH. I will set it to 5.5 and over night 6.5, adjust back down and same thing all over again. I think the plants growth has a direct correlation to whats going on. Ive grown in dwc and undercurrent with huge success and i am frustrated that this top drip is not performing. I wish it was because i built a nice system and love the top drip concept. I thoroughly washed the hydroton and it seems that i may never get the PH to settle. Maybe its the sheer volume of hydroton that is the problem...tough to say but i will stick it out and see where this goes. I guess if it ends up failing then it will be a lesson learned and i should have stuck with what was working. In this hobby i often become obsessed with trying different grow styles to become a better grower. Maybe i need to focus on my previous success.