Mosquito larvae and pupae are the best food for Paros readily available during the warm season everywhere. There are two reasons for it:
1. This food is the nearest to the natural food they get and like at home, not the same, but near to it. They like it very much. If you feed them several different foods at the same time including mosquito larvae they go straightly for them. This is due to the bigness and quickness of their movements, too.;
2. Adult Paros get safely ready for spawning by it. This is sometimes a problem. Some other foods do not safely lead to that end.
If you are used to feed Artemia naupliae to them (only good when they are freshly hatched) you are much astonished about Paros trying to catch big mosquito larvae. Before having seen this one does not think them to be able or willing to take such big stuff. But having seen that, you see that permanent feeding on that small stuff Artemia is good with respect to the nutritional value (they mostly get ready for spawning by this either), but bad with respect to missing bigness and motion of the prey.
Unfortunately, the biggest mosquito larvae and very often the pupae are too big even for big adult Paros. Nevertheless, they try to catch them but often fail. The biggest pupae are too hard, too. But you can harvest them in any stage of development, even as eggs for hatching in the tank of small young fish. They have the best nutritional value of all foods. Often, during winter time you are unable to get Paros spawning. But when temperatures rise and mosquito larvae are available, this period ends after a few days only.