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I have treated my aquarium to a new external filter , the tetra ex800. The instructions said that the outlet bar should be above the waterline. However given the nature of the tank I physically can't do that. Is there any reason why the outlet can't be underwater?
I have treated my aquarium to a new external filter , the tetra ex800. The instructions said that the outlet bar should be above the waterline. However given the nature of the tank I physically can't do that. Is there any reason why the outlet can't be underwater?