I recalled they feed on live daphnias and other organisms that float in the water. There was a discussion on this in previous threads, I recommend searching for it. I did remember someone was also using fishfood or interpet fry food mix with water and using a syringe to spray at the shrimp, I tried that before, but to no avail. I pretty reserved about getting them as many are endemic to their locality and are not known to be successfully bred in farms or at home, so all of them are wild caught. I am not surprised alot of them are wiped out in our local waters. Hypothetically speaking, I think that they being filter feeders, they cannot live in extremely clean environment.
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