Recently some friends and I saw an oppurtunity to utilize a giant "jar" that we had and attempt to turn it into a fish tank. We bought a Red Fin shark; African Dwarf Frog; Bubble Eyed gold fish; and sucker fish. The shark has recently died although he was funny to watch because he turned upside down and swam backwards. The tubes are coming from an air pump we use to give them air and keep the water moving although some have said that it looks like the fish are on IV's or life support.