Hey, saw your post about vinegar eels. They are actually really easy to culture and harvest. For culturing, they just need to be in a jar that allows them to breathe. When you get a starter culture, mix 50/50 water and apple cider vinegar with the culture in the jar you are going to use, then add some cut up apple pieces. It will be good indefinitely if kept in a cool dark place. To harvest, use a narrow necked bottle (I actually use a cleaned out beer bottle), fill with some of the culture to just where the neck narrows, the stuff a wad of filter floss in until it us just touching the liquid. Then fill to the to with tank water. The eels will swim through the floss and into the clean water to breathe, then just suck some up with a pipette or baster and add to the fry tank. Top up with more tank water and you're ready for the next feeding. I usually run two at once and they last until the fry are on microworms.