Maybe another thing to look into is vpd if your house is to hot anything above room temp(72 degrees) in the winter our house usually are about 76 degrees this causes something called vpd vapor pressure deficit when temperature rises and there is a presence of porous material(i.e your house,wood carpets,drywall insulation) and moisture is drawn from the atmosphere now scientifically speaking liquids with a higher nutrient density and specific gravity dissolve and apperate at a faster rate than that of a normal polar liquid with a lighter relative gravity and nutrient density) causing salt creep(how can this be corrected or diverted) we can put more clothes on or take them off and set the thermostat to 68 I know this is cool but your aquarium will thank you in the long run secondly we can make a lid from greenhouse paneling instead of paying 48$ for a 36 inch lid we can pay 12 to 20 for thicker and better acrylic that will also diffuse the light and keep in moisture lowering vapor pressure deficit third you can get a diffuser vaporizer and humidifier and run all of these as well as the microclimate of your room will have more moisture to draw from the air not depleting the h20 content of your aquarium,also adequate airflow ceiling fan and oscillating fan pointed on the tank for optimum airflow are all thing we should practice to help provide even more stability on a environmental level