That would be correct. I'd even top up with DI or RO water.

Nikki

spiral_72 wrote:

When water evaporates it leaves all impurities behind right? Knowing
this, I should NOT condition my water with fertilizers ect. when I top
off the tank, right?

Just a quick thought.

my aquarium page, info and pics at:
www.geocities.com/spiral_72/Spirals_page.html