Do i need a filter if i buy a protein skimmer read on

[fontanaboy909ca]

Okay i have a filter thats good for a 20 gallon tank in my 50 gallon tank. can i use that one and instead of buying a new filter buy a protein skimmer or do i not need a protein skimmer

 

[Vircomore]

Is this a saltwater or freshwater aquarium?

- Freshwater aquariums don't usually benefit from protein skimmer but you should definitely upgrade the filter.

- Saltwater aquariums can have protein skimmers but should still have good filtration because protein skimmers don't do any removing of ammonia or nitrite and I don't think Live rock alone is enough.