<span class="link_user">@Dwcgrower92</span>, yeah. Still learning tricks of the trade. The hydroton works pretty well but doesn't really shift as the plant grows. That's why I was trying out the rockwool. I might try it again in the future and use a method like you mentioned to keep algae from growing.
<span class="link_user">@Thundrfuk</span>, I tried Hydroguard once. It made the water cloudy and really difficult to balance the Ph. I might try Great White. I've heard good things. I usually use Hydrogen Peroxide to keep the res sterile. However, I got a little over confident on this run and slacked off on the daily dosage of the stuff.