White floating stuff in 2 days old aquarium

Hi!
Just got my new aquarium 2 days ago, it’s a 47gallon (180l). First day added live plants and added water. Water was crystal clear. Then added Seachem Stability and Prime per instructions and water turned cloudy. After 48h, the cloudiness has disappeared (almost) however this new white floating stuff has appeared (grows on the sand and also floats around in the water). See attached pics.
Does anyone know what is it? Thank you!!

Hello. Almost looks like a type of hair algae. I'd use a small toothbrush and remove it. As soon as you can, get going on your water changes. Half or even a little more removed and replaced weekly should keep the excess nitrogen out of the tank water and with no source of nutrients, the algae won't become a problem.

10 Tanks (Now 11)

Thanks! Will try that!