A journal of an attempt to raise Seahorse Babies

[woodcarver]

I would say 16 days was a good effort . Make sure you brine shrimp eggs are from a reliable source. You should have no problem hatching them .I used to have two bottles on the go which gave me a continuous supply.
Two teaspoons of sea salt per bottle ,good aeration. I stood the bottles in a small tank with a heater in to ensure correct temp and got at least 80 %-90% hatch rate.
Keep trying