I figured out a pretty neat trick to eliminate the bubbles in my nano DT with an
HOB filter, and thought I'd share it with you all, cause it's CHEAP!!!! I had bought a breeder box to keep macro algae in for additional filtration, and while cleaning my tank just before my
PWC, I slid it down by the filter, and wa-la!, I noticed that the bubbles stayed contained in the breeder box, and my DT is now perfectly clear. Hopes this helps the budget-minded!!