It depends on what is wrong with it.
Filter a fish? Do you mean filtering a fish's tank? Well you have to filter any fish's tank.
Your fish tank is green because of an overgrowth of algae, which is caused by excess nutrients and sunlight. To fix it, you can reduce the amount of light the tank receives, clean the tank and filter regularly, and avoid overfeeding your fish. You can also consider adding algae-eating fish or plants to help control the algae growth.
no filter because for smaller fish it can hurt or even kill them and for the old filter use bigger fish
a fish filter cleans the water and a pump pushes it through a fish filter cleans the water and a pump pushes it through
Unless u know how to fix it i suggest u buy a new one unless the fish are bottom feeders
The filter removes the fish waste and some of the other impurities.
yes,it is hard to clean out a pet fish's filter
Jawless fish are filter-feeders.
Jawless fish are filter-feeders.
The only fix is to replace the filter housing.
You just replace it.
You don't fix it, you just replace it.