I make up new salt water (I always have at least 250 gallons made) to match the SG of the nems water they were shipped in.Can you explain your process of flushing? Please
I then put nems in there and let them sit for a few minutes. They will usually expel old water and then take in new.
Once they sit for a few minutes, I massage (gently squeeze them) to get them to expel more water.
After they expel all they are going to expel, the water gets drained, they sit there 5 minutes with no water and then I drain what they expelled when they balled up due to no water.
I do this 2-3 more times (all depends on what the water looks like after each "flush") Also, you have to give them time once you add new water to open up and take water back in.
On this set of nems, I had 4 release poop and 1 release 3 small shells and poop. While this is really not needed, it gets the nasties out of them and allows them to have water in them with no funk.
I do not recommend the "massage" part for most. You have to be very gentle with them and you may end up with a reaction from touching the nem. I can touch hellfire nems with no issues, have haddonis wrap my arm with no issues and even the NPS (true hunting and eating thing nems) do not cause a reaction. Also, for whatever reason, most nems will not stick to my hands.