Feed as needed with an eyedropper, remembering that the micro worms eventually sink. Microworms will live for several hours, sometimes even for a day in your tank. It is as easy to over feed microworms as anything else if one is not observant. Vinegar Eels- Vinegar eels are also a nematodes and are only slightly larger than microworms. They are a very good fry food, especially for top feeding fry.
Vinegar eels are acid loving nematodes.
Using a one gallon jar, dump in your starter culture. Vigorous growth should occur within one week. We usually rubber band a paper coffee filter to the jar as covering and to keep the vinegar smell in better. Vinegar eels cultures can be reinvigorated from just a small amount of medium liquid months later, so this is definitely an easy and strong culture to keep going. The key to feeding vinegar eels is to siphon them into a brine shrimp net or coffee filter and rinse very thoroughly.