There is no need to seed a tank with Amphipods anyway. All you need a piece of rock or a hand full of gravel or a ball of chaeto from an established tank and you have them and a whole lot of other things.$60 to seed a tank with pods ? That is what it costs to do it with pods and phytoplankton from the Algae Barn - ridiculous ! It should not cost over $20. If you can find someone with Annelid Detritus Worms in a tank, you can get them to give you a culture of them and establish them in your tank for nothing. The population will reproduce at a fast enough rate to support a mandarin.