When I use air stones several little bubbles group together and stick around for a bit before they pop. Bigger bubbles kinda do the same thing but pop sooner. Is there something on the surface on the water that could cause this? My nitrite and ammonia is a 0. There’s no dead fish and I’ve done some water changes. When I fill a bucket of tap water and blow in it with an air stone the bubbles pop instantly. I do use api stress coat and thought maybe this was it so this time I only used prime when I did water changes. Any thoughts?