Okay I need to buy that! So I shouldn’t do a water change or anything just leave it as is?Welcome to AC!!
Looks like a bacterial bloom to me and should subside in a couple weeks though you should be testing water parameters.
How long has this tank been set up and how did you cycle the tank?
Do you own a test kit and if so please post the ammonia, nitrite, nitrate and pH. If you don't have a test kit, I recommend buying the API Master Test Kit which has the basic tests you need to monitor the water.
It is a 37 gallon tankA water change shouldn't hurt anything but be sure to use the proper amount of water conditioner to treat the chlorine or chloramine in your tap water.
What size or dimensions is this tank?
Not sure how familiar you are with keeping aquariums so if I ask seemingly stupid or obvious questions don't take offense.
I am using api QuickStart and they are plastic plantsWhat are your water parameters now? Did you get the kit? Also get live plants, not plastic ones. Live plants will help in reducing some nitrates.