How do I clean the gravel at the bottom? Stirring the bottom with gravel vac raises clouds of gunk, so I wonder if its better to remove fish while cleaning or leave them in place.
I am a newbie, have a 3 week-old fish tank (5gal Fluval Edge) with four neon tetras. They only eat food as its falling -- not from the surface, not once it touches the bottom. Plus it took a while for them to start eating. So some food particles have accumulated within blue gravel at bottom, as well as other gunk. I think cleaning the gravel is called for (now? later?)
This question below is about cleaning gravel out of a tank. Videos I see show much larger tanks. What is the safest way to clean fish gravel?