Hello ladies and gentlemen. Last night I was doing a PWC in my 46 gallon tank and I noticed a lot of bubbles along the front of my tank, but didn't pay much attention to them. This morning when I fed my fish, I noticed another cluster of bubbles between an uprooted plant that was floating. Is somebody making a bubble nest? If so, who could it be? My stock is: 3 Silver Hatchet Fish (will make 6) 3 Marble Hatchet Fish (will rehome to allow room for 3 more Silver Hatchets) 1 Guppy (male) 12 Neon Tetra 2 Otocinclus 4 Peppered Corydoras (will get 2 more) 1 Bolivian Ram 2 Amano shrimp I am guessing that it was either the Silver or Marble Hatchet fish. I know they like floating plants and I have seen them swimming between uprooted plants, but I also know that breeding those fish in captivity is extremely difficult. Could it not be a bubble nest and just accumulated air? Thank you.