How do I keep them alive?
These are by far one of the easiest live foods to keep, with the draw back being they are often ignored by larger fish. They are truly tiny! All you need to do is get a container, add an air hole, and whip up some instant mashed potatoes. Any brand should work. The consistency should be light and fluffy- an easy to spread paste is desirable. Consistency with standing water/liquidness is too wet, and dense/firm texture is too dry. Do note that a "fluid" will form on the surface of the mashed potatoes over the course of culturing- this is actually pure microworms building up on the surface.

The culture you receive will have been mixed with fresh substrate before shipping, so the worms will be more dispersed. You should still break the culture you receive from me into multiple new cultures (try 4) for the best results. If you want to feed immediately to your fish, you can home the culture in one container or two and wait a few days for them to peak out. If they were shipped as is, the population density may cause them to crash in the mail. For that reason, their population is dispersed into a larger volume of clean substrate before shipping- for their safe arrival. They are well fed with a small amount of yeast added before transport.

Make a 1/2 - 3/4 inch layer of potato substrate in your container, then add a spoonful of worm culture, gently blending over the surface. You may wish to use a disposable spoon for this. Then, add active brewer's or baker's yeast to the surface. A couple pinches will do just fine, evenly sprinkled. Add your lid. If you opted not to add an air hole, open the cultures daily for gas exchange. If you added an air hole, store the worms in a dark place with no access to other insects- such as a tote, tub, or closet.  Otherwise you can use cheese cloth, aquarium filter media, or polyester batting (for sewing) to the hole to block insects.

Harvesting and Feeding to Your Fish
If you split this into multiple new cultures: At the 10 day mark of culturing, add a piece of paper towel to the top of the culture's substrate. On the 14 day mark, you should be well ready to lift the paper towel and harvest your worms, whom have crawled on top, to feed to your fish. A plastic spoon scraping or dipping into water will do the trick. You may also separate worms from potato by adding a spoonful of culture to water, swirling, and draining off the diluted potato water to leave the worms at the bottom. (Or just using a beef baster to collect worms from the bottom.)

If you did not split: Add a harvesting cover and wait for the worms to peak in population, then begin feeding. If you don't split them, they may crash when their population density is simply too high and the substrate too saturated.

Long Term Culturing
Around the 14 day mark, worms will be on the walls of the culture and thickly spread across the surface of the substrate. You can spoon the substrate into new clean cultures then re-fill with new potato to keep them going or help them grow in even more number. If you don't want to make new cultures, you will still need to remove at least half of the substrate and replace it with new to keep your microworms going strong.


DOA
Microworms are EXTREMELY tiny. You may only see a few individual worms stuck along the bag and what looks like a slick lubricated residue (actually worm clusters) upon arrival. Please attempt to culture your worms appropriately before declaring the culture was DOA, especially if this is your first time with microworms. These worms are sometimes not active upon arrival, but are very much alive! 
I will attempt one 100% free re-shipping if you try to culture them, after 5 days, provided you send (clear) photographic evidence of a non-prospering culture, but I don't offer refunds.

!!Consider holding your purchase at the post office to prevent exposure to heat.!!

What else is in the shipment?
You only receive live microworms in the order. There will be no care instructions or culturing container.
Allergy information: Contains potato, yeast, and traces of oats.