How much Salt

A table for the amount of salt to use in keeping brine shrimps, taking account of different units (metric vs U.S.). I put it together after seeing this is asked about frequently within the Sea Monkeys/Aqua Dragons communities. Click on the table to access the full size version.
(This table has been revised on 19th Apr 2021)

The references I used regarding “optimal” salinity:

Effect of Light, Temperature and salinity on the growth of Artemia by G. RAJ KUMAR1, Prof. D.E. BABU.

Salt sensitivity of the morphometry of Artemia franciscana during development: a demonstration of 3D critical windows by Casey A. Mueller1, Eric Willis and Warren W. Burggren

A few notes from my own point of view:

• Litre and Quart are almost interchangeable. That is why many recipes found on the internet usually treat them as the same.
  
• Although in the context of commercial agriculture, technical documents and papers would talk about the different optimal salinity for hatching and culturing, it is really for optimising growth in a fixed amount of time as their goal is to harvest the maximum biomass within a given time frame.
  
  For casual keeping, many people do not aim to keep more than one tank or creating a separate “nursery”. Since brine shrimps can tolerate a range of salinity, there really does not need to be one right answer for the salt amount as long as it is within the common range of 15 ppt – 35 ppt in which they can survive well enough. That is probably why some people find it confusing about different advices regarding salt amount.
  
• Osmoregulation – the regulation of salt and water balance inside the organism – is usually an energy intensive work. Brine shrimps can survive at high salinity but it is a harsher condition that require them to use more energy for pumping out the salt actively. The lower salinity resulting in larger size or faster growth is therefore a logical outcome.
  
• Brine shrimps can survive in a range of salinity, but to change the salinity of an established tank, always do it gradually and slowly to avoid shock caused by the sudden change.