Your fabrication skills always amaze me.
I was thinking if just covering the plastic container that sits on top of the box would prevent algae growth (for example, black duct tape or aluminium foil).
And I wonder if it being inside would be less evaporation?
Yes...that would work as well. But putting the drip tank inside seems to be the most logical choice since there is plenty of room for it.
another nice video. BIG LIKE