Daily harvest:
I use a plastic coffee filter to screen out the big junk. I set this on top of the rot filter, and pour off half of the culture through the 2 filters. Rinse clean the coffee filter, letting the junk go down the drain, with tap water, and put away. Then I add back the same volume of warm fresh saltwater 20-25ppt that I previously took out of the culture. I then stick the filter with the rots on it into a container of 1/2 the culture's daily ration of rotifer diet and saltwater, in a volume just enough to cover the rotifers on the filter. Let this sit for 20-30 minutes to enrich them. Then pull up the filter and feed the rots to the larvae or the reef. The leftover rotifer diet from the enrichment container can be poured into the rot tank to feed the culture of rots. Rinse all containers and filters with tap water and air dry. About every other day I dissolve a tiny pinch (1/10 teaspoon) of chloramX in rotifer water and add to the culture. Air as usual.
Every 3 days or so:
Pour the whole culture through the double filter discarding the water and what collects on the coffee filter. Clean the culturing vessell with warm tap water and a piece of blue filter fluff, or get a fresh container. Rinse half or all of the collected rots back off the filter and put into the clean culturing container with fresh saltwater, and add food. Air as usual. If feeding larvae, enrich the rots reserved for this purpose and use the leftover enrichment to feed the culture as above.
HTH
Kathy