I have recently stocked my tank (less than 10g) with some Rummy Nose Tetras. I have the filter outlet just above the surface to increase the surface agitation to increase the oxygenation (as told to by the shop) and have it pointing diagonally from the rear left corner to the front right corner - this creates quite a strong current across the top of the water down the front glass and back across the gravel from the front corner back across towards the filter again. My question is: the Rummy Noses tend to spend their whole time swimming near the front glass trying to swim up the flow of the water and then getting washed back across the tank. I am trying to work out if they are enjoying themselves or if they are stressed and I need to some how cut down the speed of the current. The filter is recommended for 0-80 litres but there is no control of the output.
I basically want them to have a good time but don't want them to be swimming frantically against the current the whole time if it is not good for them. I also have some neons and they seem to just go elsewhere in the tank where there is virtually no current, so there is places where the Rummy noses could go to be out of the current but they spend most of thier time in the strongest part of the current - any advice would be greatfully received.
I basically want them to have a good time but don't want them to be swimming frantically against the current the whole time if it is not good for them. I also have some neons and they seem to just go elsewhere in the tank where there is virtually no current, so there is places where the Rummy noses could go to be out of the current but they spend most of thier time in the strongest part of the current - any advice would be greatfully received.