Freshwater, brackish or either
Well here is the post as promised.
First of all, mollies do well in any water type. I have raised them in purely fresh water in the past and they thrived and multiplied. I have also had them in brackish water, well it was 1 tablespoon per 10 gallons but it had salt in it.
Remember, this is freshwater species only, not saltwater species.
The question is:
Is there a truely freshwater fish that will not survive in salted, brackish water?
Is there a truely brachish fish that will not survive if there is no salt in their water?