In the past two days, I've noticed drops in my water levels - nothing huge, just enough that my Rio pump in my wet/dry is pulling in air. Is this normal? I had to top it off last night, and again tonight. Should I be seeing this much evaporation on a daily basis? It didn't seem to be this bad before.
Has anything about your system changed? In the winter it is common for evaporation to rise, the house heaters are running and the air is very dry, it litteraly sucks the H2O out of our tanks like a sponge. On a 20g tank, I evaporate 3/4 to a full gallon per day.