u/Intelligent_Ride3730

My parents haven't cleaned their pool in a few months, and we saw this on one of the steps. It's about the size of my palm. I tried identifying it on my own and so far I've read that it could be some kind of colony of microscopic organisms or bacteria. Does anyone know what it actually is? And should I be concerned?

I'm trying Big Globe for the first time and I love it, but it spawns these giant structures way too often. I'd like to reduce them a lot so they feel rarer and aren't in every direction I look. Does anyone know how to do that?