So far so good. It sounds like you did a good job of acclimating them and that the new arrivals are settling in and exploring their new surroundings. The male seems like he is a little stressed out, but nothing serious; just give them plenty of peace and quiet for now as you have been doing, and his breathing should gradually returned to normal. Try offering them some of the live red feeder shrimp tomorrow morning, and let us know if they both eat and if the stallion’s respiration has improved (compare his breathing rate to that of the female, who seems to be thriving).
In the meantime, just try to relax and enjoy your beauties from afar, Christine! Optimum water quality, a stress-free environment, and plenty of peace and quiet is all they should need for now.
Best of luck with your new seahorses, Christine!