Abstract: This self contained, add-on, self cleaning, instant reverse flush aquarium and/or fish-pond filter system is designed to capture all aquarium and/or pond solid detritus and to deposit them in the spaces between a heavy marbles-like filter substrate in such a way that these detritus can then be often and regularly evacuated by reverse-flush action from the filter-body and the vessel containing this filter-body, very fast, very easily, without any in-tank manual intervention and with a minimal amount of water wastage. This instant reverse-flush aquarium and/or fish-pond filter system will be available in many various sizes, shapes or models that can be added at any time to any aquatic life containing vessel of any shape or size, with the purpose of easily evacuating pollution causing debris as often as possible, hereby minimising the need for biological and/or chemical filtration stages and also drastically reducing other stress causing maintenance.