Floating weird goldfish poop

[SaltyGoldfish]

So I’ve been feeding my oranda who’s about 2 years old and about 5-6 inches the same 3 things every day here’s what they are Breakfast:NLS goldfish pellet Lunch: diy veggie packed gelatin (feed that twice a week) and dinner: north fin bug pro pellets.
Anyways I noticed this for the first time and I always look at my fish tanks but I saw a big grey/brown floating poop with like a big bubble in it. I read that it could be parasites! I have 2 mystery snails and I just got a small clown pleco last week and I know it’s not from him I’m nervous cause I’m going to be out of town until Sunday and I love my fish someone please help

 

[Autumnsky]

It could be from that new fish. Using a QT is a good safety net.

I recalled that there were a few interesting things about GF poop, yeah interesting, lol. A quick check

here - scroll down about half way, there's a short paragraph about air bubbles in poop mention water temp too high and need more O2 when it really warm
https://www.bettacarefishguide.com/goldfish-poop-is-it-normal-or-is-there-something-wrong/