Preface: Small fish tanks are often the entry-level choice for fish enthusiasts, and the filtration selection of this small-sized fish tank is already difficult to choose, let alone the corresponding circulating water pump.

I once replied to Fish Friends about how many watts of water pump to use for a small fish tank. Now, let me talk to you about the selection of a water pump for a small fish tank filter. What kind of filter should be used and how many watts of water pump should be used?

The principle of selecting water pumps for small fish tanks is to try not to occupy the space of the tank as much as possible

Firstly, the space of small-sized fish tanks is relatively small, and the principle is to minimize the occupation of water space. If you insist on using a water pump to build a circulating filtration system, then a low-power water pump is sufficient.

Next, let me take the size of a small fish tank that I once answered to a fish friend. What kind of water pump should be equipped with a small fish tank that is 23 centimeters long, 17 centimeters wide, and 15 centimeters high? I think this small-sized fish tank with a 3-watt power water pump is sufficient.

One thing to note: we choose the pump according to the specific lift, but we are accustomed to using Power number (wattage) to measure it. The corresponding head of each Power number may be slightly different, but the difference is not large, which can also be referred to.

If it is a standard correspondence, then selecting a 3W water pump for this size of fish tank corresponds to a head of at least 0.5 meters, which is definitely sufficient for filtering circulating water in the fish tank.

Multiple filtration methods can be selected for small fish tanks, and waterfall filtration is sufficient.

Here I have a suggestion: because such a fish tank is not large, I think using a water pump to pump water and then filter is not a good solution. (Of course, this is possible) My suggestion is that the small fish tank can directly use a waterfall type filter or water demon to meet the filtering requirements.

The reason why a small fish tank chooses a filtration system should be to not occupy the space of the tank, as the water space of the small fish tank itself is not large. And if we add another water pump to the fish tank, it will undoubtedly occupy the space of the tank and affect the aesthetics. Therefore, I think everyone can change the solution: a waterfall filter.