I did try keeping them, because back then I only had a small batch of fries. I harvested it and kept it in salinated water (marine salt) at a depth of about 1.5cm. They can last up to 3 days on which in the 3rd day low brine shrimp activity could be observed. According to the thermometer reading, tempreature is set at 4 degC.
Hope it helps.
Andrew
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