u/Classic-Window9761

I just got this plant today, and I noticed these spots on the older leaves. They don’t come off from my finger, and the newest leaf looks healthy. It’s in a perlite orchid bark soil mix.
I don’t know the history of light levels or water levels unfortunately.

I got a trio of pearl gouramis about 2 weeks ago, one male and 2 females, I saw the male making a bubble next about a week ago but I definitely wasn’t expecting to be a grandmother this quickly. I really have no idea what to do here, I definitely don’t have room for 100 new gouramis lol. Is there a way to rehouse them? Does anyone have experience with this