It is normal most every goldfish does it, don't worry.
the turtles breath from there mouth cause when the turtles go to the top of the water to get air the air they get from there nose goes to there mouth
Fish comes top of the water to get oxygen.
The bubbles need to go in the water, facing the bottom of the pool.
The water displaces air, which moves to the top. It comes up through the water layer, creating bubbles.
because i told them to do so. ;)
using their gills they obtain oxygen from the top of the water.
It is either well trained or dead.
the water is evaporating which pulls the water into a gas and the air bubbles take up at that space, come to the top, and dissappear so if its out long enough the bubbles might go away
yes does bubbles at the top of the water are made by spit
Water vapor (steam) is inside the bubbles that form inside boiling water. The bubbles that form prior to boiling are mostly dissolved gases escaping from the water.
It's for blowing your top.
yes, as long as the tank is big enough. i have 8 different types of goldfish, some of which are over 10 years old, and i have found the rule that work best for most types of goldfish is to have 1 gallon of water and at least 6'' sq. water surface area per inch of goldfish. with a bubbler, that rule can be bent a bit. it is good to make sure goldfish have enough space because goldfish use more oxygen and emit more ammonia and other oxygen-replacing toxins into the water than most other types of fish. the extra surface area is important to ensure that the fish get enough oxygen. overall, it is very possible and easy to keep healthy goldfish without a bubbler or aerating filter, but it is not a bad idea to have one of the two.