This white stuff was on my aquarium right above where there is usually water... I've seen this stuff on my aquariums from when I had tadpoles before, right above where the water usually is there too. (making me think it is probably minerals from the water near the surface evaporating and thus lowering the water level.) Also disinfectant wipes do nothing.



(note: moisture in pictures is just water from me trying to clean the stuff off...)



Figured I should check just to be sure. (If it is mineral deposits is it safe to leave them? They are hard to clean off and it is hard to avoid considering I can't leave distilled water in the bottom of the tank for the frog to soak in.)