I have a 40 gallon tank with 1 adult and 8 juvinile emps. I noticed a mite infestation and I want to use the hypoaspis miles to get rid of them. The problem is - though I have been able to locate sites that sell the hypoaspis miles, they require that a huge amount be purchased (at a huge cost). My question is this: Where can I purchase the h. miles in the quantity that I need? THANKS!! Deb