Fish tanks more than 2 feet in dimension are highly recommended (It is because small fish tanks will deteriorate water quality rapidly.). Filters are required and jars designed with bottom filters are preferred. The bait debris and droppings in bottom sand can be cleaned. In addition, there should be a set of pneumatic sponge filters additionally installed to increase the oxygen solving volume. Bottom sand can be designed with ADA Aqua Soil – Amazonia or oceanic gravels . 1/3 portion of total aquatic water should be replaced with new water every week.