(October 17, 2018 at 12:30 pm)Jörmungandr Wrote: Evaporation is both good and bad. It's helpful to replace some of the water in a tank periodically to reduce the buildup of toxins and debris.
That's why you do weekly water changes and vacuum and stuff.
Also, the lid is as much to keep my cat out as it is to keep water in.
Teenaged X-Files obsession + Bermuda Triangle episode + Self-led school research project = Atheist.