When I make up food for the tank I use 2 shot glasses half filled with tank water. In one glass goes 1 cube of mysis and 1 cube of brine, the other glass gets a chunk of nutramar ova. I then put in some Selcon into each glass and let it sit. During feeding I use all of the food and water/selcon, even if it means rinsing the glass in the tank. So long story short, I use selcon for my filter feeders.