I have a problem with water evaporation. I have a 29 gallon fresh water tank. I have 1 light on it and what isn't covered by the light is wide open. I have a small heater and the water stays at 75-76 degrees fahrenheit. The tank is used but I leak-tested it and it didn't have any issues. I also don't notice any water on the floor under the tank. I go through 1-2 gallons of water per week (sometimes more if the light is on 24/7). Is there a way to prevent this or slow down the evaporation? I've noticed it's not as bad if I keep the light off but it still loses water! Anyone have advice? THANKS!