Understanding the Impact of Fish Tanks on WiFi Signals: Tips for Improved Coverage

Fish tanks can minimally impact WiFi signals due to water's absorption of radio waves. However, most home aquariums aren't large enough to cause significant interference. Factors like tank size, shape, and location also matter.

Article photo for Do fish tanks reduce WiFi coverage
Do fish tanks reduce WiFi coverage?

As a long-time fish and aquarium enthusiast, I've often heard people ask, "Do fish tanks reduce WiFi coverage?" This is an intriguing question, and one that I believe deserves some exploration. After all, in today's connected world, where everything from our phones to our refrigerators seems to be online, WiFi is critical. So, if you're planning on setting up an aquarium at home, it's only natural to wonder if it could interfere with your internet connection.

What Affects WiFi Signals?

WiFi signals are essentially radio waves, which are a type of electromagnetic wave. These waves can be disrupted by various factors. Most commonly, physical obstructions such as walls, doors, or even other electronic devices can interfere with WiFi signals. But, would a fish tank fall into this category? To answer this question, let's first look at how WiFi signals interact with water.

WiFi signals can indeed be absorbed by water, causing signal loss. This is because water molecules resonate at the same frequency as WiFi signals (2.4 GHz), leading to signal absorption. The more water molecules are in the path of the WiFi signal, the more absorption occurs. In this light, it's not hard to imagine how a large fish tank could potentially interfere with WiFi signals in your home, especially if the tank is located between your router and your devices.

However, a few factors could mitigate this. For instance, the shape of your fish tank could influence how much it affects your WiFi coverage. Tanks with a small frontal area (like a tall, thin column-shaped tank) would disrupt less WiFi signals than broader, wall-like tanks.

How Much Can Fish Tanks Affect WiFi Coverage?

Understanding that water absorbs WiFi signals is one thing, but what does this mean in practical terms? To put it simply, unless your home aquarium is massive, it's unlikely to have a significant effect on your WiFi coverage. For one, most residential fish tanks aren't large enough to absorb a substantial amount of WiFi signals. Plus, the distance between your fish tank and your WiFi router will also come into play. The further away your tank is from your router, the less likely it is to interfere with your WiFi coverage.

That said, if you're still concerned about possible interference, there are some simple solutions you can implement. First, try to place your WiFi router in a location where it doesn't have to transmit signals through the aquarium. You can also use a WiFi extender to strengthen your WiFi signal in areas of your home that are far away from your router. Moreover, regular maintenance of your aquarium, like cleaning your fish tank, can also help reduce any possible disruptions.


In conclusion, while water does absorb WiFi signals, a typical home aquarium is unlikely to significantly reduce your WiFi coverage. The impact on WiFi signals would largely depend on the size and location of your fish tank relative to your WiFi router. If you're planning on setting up an aquarium, it's a good idea to consider these factors to ensure a stable internet connection.

So, should you hold off on getting that fish tank you've been dreaming of because you're worried about your WiFi signal? Absolutely not! With a little bit of planning and the right setup, you can enjoy the tranquillity of your home aquarium without having to sacrifice your internet speed.