Hello Fishtastic and Welcome to Fish Lore. You have some beautiful fish there. Some great advice and suggestions above.
Here is a link to the
nitrogen cycle that is crucial to fish keeping:
The Aquarium Nitrogen Cycle
Read it and if you have questions by all means don't hesitate to ask.
It does appear that the Molly has clamped fins which is not a good sign. Do you have a
test kit? What is most recommended on this site is the
API (liquid) Master Test Kit. This kit will test for everything mentioned in the Nitrogen Cycle link (ammonia, nitrites, nitrates and
pH). Once we know your test readings a lot more advice can be given to help you.
Best of luck
Ken