Ok So last night i added the tinfoil (no ductape, i just used typical clear houstape to tape it down) woke up this morning and humidity was at 59%. It actually stayed steady. After being gone from 8am-930pm, my humidity had only dropped to 50%. Definately a big difference. I did still have the towel over the tank so that added an extra layer that also covered the non tinfoiled area. Definately worked a lot better than just usingb binders, and what not.