My fish tank water level is dropping . It's not a crack tank this a brand new 55 gallon I purchased. I did a water change last week filled up the water above the suction cup on my thermometer and this where my water is at now. I'm guessing it's water vaporization happening . Are there plants I can get to help that ? Or should I be less concerned about it. I do weekly water changes anywhere between 40-50% depends on how much poop there is . Down below is a picture so you can get an idea how fast this happens.

