Yes
you can put in sea snails and more brightly fish that you cant get with a heater in your tank
you can put plastic in a fish tank but it has to be plastic if it's a polyester material it's toxic and can kill your fish
Most fish are around 78 degrees F.
The only thing that you can put in a tank that small is a betta fish or african dwarf frog. Tropical fish do better in a tank that is ten gallons or more. If the tank has a filter and heater you could put one guppy into it but that would be all and I doubt it has a filter and a heater.
You can but it will need to be a plastic or acrylic heater, inline heater, or have a heater guard over it, otherwise it may melt the acrylic. For smaller tanks small mini heaters are available that would work just fine. Check out www.bigalsonline.com they will have what you need.
Yes! All of my freshwater fish have plastic plants.
guppys are tropical fish. they require a heater, and 1 gallon is to small for a heater
In a fish tank, you should put items such as a filter, heater (if needed), gravel or substrate, decorations like plants or caves for hiding, and of course, water conditioning products to make the environment safe for fish. Additionally, you need to add fish that are compatible with each other and the tank size.
Freshwater setup: MUST HAVE: Tank, filter, filter pads/media, heater, light, fish, water, electricity, fish food, place to put tank NICE TO HAVE: Substrate, decorations, tank lid
the best plant would be a live one plastic plants can cut or damage the fin of your fish
Plastic sunglasses if free of harmful chemicals and cleaned should be fine.