Re: Splashing fish, lights and hard water

I too thought that I would be able to increase the light in my tank if I
did not use a glass cover between the lights and the water. I never had a
problem with bulbs popping from splashing but it took me months to figure
out why the water was getting harder and harder. Without the cover, water
was evaporating. When I did my water changes I wa also replenishing the
amount of water that had evaporated. The net result was that I wound up
with hard water. I put the glass cover back on and the problem is slowly
going away.
Justin  in Springlike Savannah