I think you mean without a heater but if you dont the temp for the average tropical fish is 19 degrees celsius to 30 degrees celsius. coldwater fish will survive with a heater if its at a low temp and so can tropical with a heater at a low temp.
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.
There are millions of tropical fish in the tropical oceans. But they are all marine fish not freshwater fish. Freshwater tropicals can not live in saltwater.
No. Tropical Fish required warmer water.
Most tropical fish live in the ocean, but some do live in freshwater.
Not at all. Koi produce enough ammonia to kill tropical fish, and the betta needs a heater.
Blood parrots are tropical fish, yes they do need heaters.
No! because tropical fish live in heated water and koi in cold water.
Tropical fish.
you can put in sea snails and more brightly fish that you cant get with a heater in your tank
parrot fish live in tropical waters
I have tropical fish and i feed them fish food which says on the label 'tropical fish'.But tropical fish that live in the ocean eat either other smaller fish or worms, really anything they can find.
Those are salt-water tropical fish not the freshwater fish you see in pet-stores.