Problem with experiment

I have encountered a problem with my experiment. The brine shrimp would not hatch!

I have repeated the experiment twice but the brine shrimp did not hatch even after 3 days.

There are a few possible reasons for this:

1. Not enough heat

Brine shrimp need an optimum temperature of 26-28 degrees Celsius to hatch

Solution: Place a torchlight near it (?)

2. Inadequate salt

I used table salt but after checking some websites, they recommended sea salt as table salt contained additives.

Solution: Buy sea salt

3. The eggs could have rotted

This is highly unlikely as I used eggs from the lab but it is still a possibility. Brine shrimp eggs usually rot after 2 years.

Solution: Buy new brine shrimp eggs

4. Baking soda

I read on some websites that baking soda should be added to table salt to increase the salt content.

Solution: Buy baking soda

I am going to test Reason Number 1,2 and 4 first as they seem the most likely.