The aquarium filter is too fast for water to go down
If you don't want to change the filter, increase the leak in the filter. Do not filter the filter ring
If you have four colored immortals like the still fish, you'd better change the filter. The water is so big that it can't stand it
Don't use the filter trough, find a big, fine fish, copy the rack on the cylinder, put the biochemical cotton in it, and put a layer of filter cotton on it, the water will leak, and that's what I am
