Interesting, guess in all the time I've been on RC I've never heard anyone mention doing this as part of regular maintenance. Learn something new every day. Just glad I happened to notice it when I did. I heard a tapping noise and it just so happened that the water was leaking onto the plastic wrapper of something I had in the stand, causing the tapping noise. Otherwise, it probably would have gone all day today. Learn something new every day. As it is, I only lost maybe a couple gallons at most.
On a sidenote, I solved the mystery of my missing Carpenter's wrasse. When he went missing I searched all over under my stand and surrounding areas. Pulled stuff out I had stored in there, etc. Pulled it out again last night to clean up this water and lo and behold, one wrasse body. So, mystery solved - he managed to fly out of the tank, miss the lighting, and exit through the small open area on the back of the canopy.