probably not, marine fish are designed to osmoregulate at a very specific and unchanging salinity (usually a SG of 1.025) whereas brackish fish by nature are adaptable to anything from fresh water to fully marine but are usually situated around a SG of 1.008. odds are if you put a marine fish in brackish water it would die
NO do not put tropical and marine fish together because marine fish have salt water that has to have specific things in it other Wise they will die .but tropical fish just have to have warm water with a heater .you cant mix these together because of the water and ALL your fish will DIE.
Damsel fish are OK in a Marine (sea water) environment. They will not survive in fresh water.
It is about osmoregulation. Salt water fish has some level of salt in its cells, which is low in concentration than marine water and more than the freshwater. If you put a saltwater fish in fresh water, excess amount of water will enter the cells of the fish and the cells rupture. This is why salt water fish cannot survive in freshwater.
Some marine fish can live in fresh water. But most marine fish are adapted to salt water; because of the salt in the water their body needs to do things differently, and they are used to being in salt water. If you put them in fresh water, their body can't do the same thing, therefore most of them die. For more information, see the related question.
small ones
They're designed for salt water, not fresh water! Just the way they are made. You can get aquarium salt from your local pet store, but don't put any in there if you have other freshwater fish that don't need it. Or get a tropical freshwater fish like mollies instead!
Salt Water Fish
dont put a fish in water
You should never put any terrestrial flower in water that has live fish in it you will poison the fish. If you want to put a plant in a fish tank or bowl, then the type of plant depends on the type of fish that you have (Which was not specified in the question). Marine fish can have many types of algae. Freshwater tropicals use various forms of tropical aquatic weed. For coldwater fish such as Koi there are flowering plants which can be used in ponds safely.
It depends. If your fishtank is for salt water then no. But if it's for fresh water then yes
20 minutes
You can put it right in with your fish if you like! As long as you put the recommended amount in, the water will automatically diffuse the solution.