Saltwater aquarim kits are available at a wide variety of retailers, however I would recommend Big Al's Aquarium Services. Their website is www.bigalsonline.com
Your local pet store, or a specialty aquarium store would be your best bet. Checking your yellow pages will show you if there are any of these companies in the area.
You can raise a sea urchin in a salt-water aquarium. There are no fresh water sea urchins so you would need a salt-water aquarium to properly care for the urchin.
killing germs.
Aquarium salt is manufactured for different reasons than making your aquarium the perfect environment for salt water fishes. You may use it in an emergency, but long term is harmful to your fish. Marine salts contain the necessary salts and minerals that fish need are the best salt to use.
Underwater sea animals live in salt water
No you cannot do that. There are special minerals in the salt water that the fish need to survive. Even though there may be some fish that can be in both types in water. Like a dolphin. If you do want a salt water fish you could buy sea salt and add it to your aquarium.
No you don't.
they need dechlorinated fresh water, and dechlorinated salt water made with aquarium salt.
You should ask this question in the 'salt water' section.
Regular salt may contain anticaking agents nuisible for fish.
I have freshwater fish and i use aquarium salt. I put more in every time i do a water change
Nothing...they die....
This salt may contain another additives as anticaking agents nuisible for fish.