Get it treatment from a store but a safe alternative would be to turn up the heater by a few degrees but dial it back down after a week or less, also you can drop 1 piece of garlic per 2 gallons
Neon Tetra-3 need to be in school
Guppies- 2
Platies- choose either one molly or platy, they both reproduce very quick and your tank will become very crowded and nitrate with increase
Mollies
Danios- 1 but some can be aggressive if they are bigger than others
also check out my post on...
I'm going to get a 30 gallon for mudskippers.
1. How can I make or where can I get a tide system
2. How many can I put in there
3. Can I put Killifish in the tank
4. Do you need a tide system