With number 1 you should be ok with cherry shrimp, but none of the other parameters are suitable for either in real terms, though you could try neocaridina with 4? There is a small chance caridina may take to 4 but they are much more difficult to keep, even in the right parameters. Could you ask the LFS to order you some remineraliser, or test kits, or order some online? I know someone on here from Hong Kong bought stuff from ProShrimp here in the UK, though that was before the world went COVID-19 crazy? Amazon or ebay maybe if not? What shrimps are available where you are, or will they be through the mail? Simon