What should I do??

[Sneaky]

I think black skirts would be fine in your
25g tank. They really are too big for a 10g (as are mollies).
Cardinals definetly dont live 10 years. Maybe 5 at most,
but i still doubt that. Neons and Glowlights average lifespan is
get this "185 days", but can live to a maximum of "560 days".
Mine are 3 years old or so, so have beat that by a lot.
Thats in my fish book, cant remember what its called, its an older
one my mom gave me.

I dont suspect cardinals live that much longer than neons.

You definetly would not want to put any tetra in a brackish water
tank. Mollies, though not really needing salt at all, will be tolerant of it,
tetras are definetly not tolerant of salt. A half dose is usually recommended.
More than that often results in bloating and dropsy, as salt improves osmosis, and opens the pores in the skin more, allowing a greater amount of water to flow through, resulting in imbalances.
I am definetly not a pro-salt person myself, dont believe in it, dont use it, dont keep mollies in brackish water only in fresh. Im of the belief that salt is a placebo, it makes you feel good but does nothing for the fish beside improving osmosis. Thats just me though.

I read your mention of frogs - ADFS come from several lakes in Africa - they are called the Rift Lakes. Victoria, Tanganiyka, Malawi, and a couple others.
These lakes are often temps of 82 to 88 or even 90+ degrees. These frogs have poor internal temperature regulators, and unlike our native frogs who can be frozen and come back to life, ADFS cant handle cold temps (temps below 76F). They develop red leg - which is caused by a pooling of blood in the extremities, espescially the back legs, and lack of blood flow to the lungs, heart, and brain. This results in death.
I make sure mine stay warm, as I also lost 2 to this in my early days of fish keeping when I was told by the pet store that 72F was warm enough for any tropical fish!
I love the little guys. I recently lost 1 to an injury (im betting it was a yoyo loach in its zeal for food that nipped him).
I plan to get a couple more. I like to keep around 5 of them at least.
Great little frogs. Or, I may move the remaining 3 I have now to my 10g tank.
Then they arent at risk from the yoyos.

I lost one of my 3 pearl gouramis yesterday, she was severely bloated, and I am assuming that her body was unable to pass the dead camallanus worms out, and resulted in death. (most common cause of death in fish being treated for camallanus worms).
It was a sad day - pearl gouramis are my favorite gouramis, these ones eat from my hand and come to the top for pets every morning. Very friendly fish. Sad to lose one.

P.S. your hubby should talk to my boyfriend. On Valentines Day im lucky if I get a box of chocolates lol