Angellove78
Aquarium Advice Addict
From what I read, Your beneficial bacteria found a home. They say it's harmless and your pleco will love it. And yes, it will cause ph to drop. They say it will naturally go away in a few weeks or so. But if you want, you can take it out and scrub it. It's a natural fungus. But, I'm not 100% sure. It's just what I thing and what I've looked up.