You must have to manage the oxygen level in the water. It is necessary to set the better filtration in the aquarium. You need to manage the proper filtration system in the aquarium to manage the oxygen level.
You must have to set the proper system like biological system to manage the filtration. You must have to change the water level if you see that the water level.
It is necessary to test the water level to get the ideal situation and find the better filtration system for you. You must have to check the proper filtration system to increase the oxygen level. You can get the idea to change the water condition.
