I had a breeder give me this tip, and it seems to work great. When feeding microworms, instead of waiting for the worms to crawl up the walls of the container, soak a piece of paper or coffee filter in water, and stick it to the side of the container so that one side of it just barely touches the culture. The worms will almost instantly start crawling up the paper at twice the rate of the walls, because it gives them more traction. Then, when you want to harvest and feed, simply get a cup of tank water and dip a corner of the paper in it, give the worms a bit to settle at the bottom and use a turkey baster or eye dropper to spread them around the tank. This helps keep the culture's medium out of the fry tank, and is overall a lot easier. Careful not to overfeed, though.