Canistor filter will be the best choice.
But if your tank is small, less than 2ft, then you have to use internal filter.
Overhead filter is out.
There are a number of disadvantages.
1) Too much water movement.
This will affect plant growth. In addition, the CO2 injected will be
diissipated away at a faster rate.
2) May not have sufficient space for other assessories like lights, fan.........
Bookmarks