Aquarium Filter Current Too Strong – How to fix this issue?

Whoosh! I’ve always been trying to figure out exactly how to lower the power and current of that filer I attached to my aquarium. Lucky enough, my research has led me to some sufficient solutions.

How Do You Reduce Filter’s Current in Your Aquarium? It would appear that there are several ways to achieve this goal. In order to decrease the power of that filter along with the strength of the current, you can either adjust the flow control on the filter intake, add rock or cave structures, add live or plastic plants, or add the element of motor speed control. If your filter is causing trouble even after trying to fix the issue, you can check out Fluval External Filter (my Recommended Filter) here.

Creating a steady current in your aquarium is vital in circulating and evenly distributing the qualities of the water. This ensures that the tank maintains an even temperature, an even dissemination of bacteria, and level oxygenation as occurring through the process of surface agitation. Taking into account the speed of the water current is also necessary because some fish require slower moving currents than others.

Decreasing Filter Power and Water Current Speeds

Adjusting the filter power and water current speeds within your aquarium is essential, as it may affect the ability for your fish to swim comfortably and thrive naturally in their habitat. There are some fish i.e. darters, hill stream loaches, etc. that prefer the stronger currents because evolution has effectively granted them the title of a strong swimmer.

However, there are also some fish i.e. guppies or weather (dojo) loaches, etc. that require a gentle slow moving stream as they are not very excitable and not particularly fond of being forcefully moved by a current. If you are housing aquatic creatures that require less movement, it is vital that your current speeds and filtration power are decreased.

At the outset, a common method to achieve this is simply adjusting the flow control on the filter’s intake. If you are in possession of an aquarium connected to an external filter, understand that most external filters contain a flow-restricting valve on the filter’s intake tube.

There is often a flow control knob that, when turned accordingly, will restrict water from flowing into the filter as well as reduce its productivity. This will decrease the gallons of water flowing through the filter, water circulation, and strong water currents. Another method which is commonly practiced is adding rocks or caves to the aquatic setting.

Rocks and caves, especially in nature, can act as barriers in your tank, redirecting water flow patterns and reducing current speeds. Fish that prefer the solace of effortless floating can easily take comfort within these rock or cave like structures as they can generate pockets in the aquarium which will allow them to do just that.

Plastic or live plants can also deter the effects of a rapidly moving current. In nature, it is common for slow moving fish to find “quite zones” uninterrupted by the turbulence generated in their body of water. Whether live, plastic, or silk, adding plants to the setting increases these “quite zone’ areas, and loosen the restriction on your aquatic life.

Furthermore, one of the most notable trends in the market for aquatic enthusiasts are DC-current return pumps, which effectively add a motor speed control. These DC motors allow you to precisely control the rate of your water pump, water flow, and water current movement. For more information.

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How Water Current Speeds Affect Your Fish’s Ability to Feed

Current speeds vastly affect your fish’s ability to feed. Typically, slow moving or floating fish simply do not have the energy and exertion necessary to chase the nourishment you provide through the surface of a fast moving current.

If your current is too strong, the lesser aggressive fish will make attempts to get to that meal, but they will not get all that is necessary to ensure their continued survival.

This combined with their use of extra energy can result in their malnourishment and depletion of comfortability. Reducing the speed of the water current in your aquarium is the finest solution to maintaining the healthy sustenance of your less aggressive aquatic life, especially when it is feeding time.

The Effects of a Fast Moving Water Current on Water Circulation

The constant circulation of water in your aquarium is paramount in the maintenance of the aquatic environment. Circulation of water promotes healthy oxygenation via surface agitation, reasonably distributed temperatures, and beneficial bacteria existing amongst all areas of the tank. A common misconception is that rapid currents generated by filters increases the productivity of the tank’s ability to remove debris and assist in water clarity. Although this can be true in many instances, these rapid currents do hold the possibility of disrupting the aquarium. Fast moving currents stir and move the contents in the tank, but they do not evenly distribute what is necessary to maintain less aggressive aquatic life. Beneficial bacteria, oxygen, and warm temperatures will only be partially circulated throughout the tank, and so the inhabitants in your aquarium will find a full dividend in each area they swim. Such separation is not on par with the natural conditions of the aquatic life’s existence, and it will create harsh conditions that will disrupt your fish’s ability to survive.

Determining Adequate Speeds for Your Aquariums Water Current

In order to determine the correct speeds to adjust your water current, you must simply study your fish. Each fish is different in regards to what is naturally suitable. For instance, many fresh water fish enjoy the swimming with and against the current as within their natural habitat, rivers and streams often produce these conditions. However, you may encounter the fish that prefer deep coral reefs, you’ll find that these water current speeds are drastically slower than others. Fish found in both environments are genetically predisposed to be physically compatible with their marine habitats. You must explore your aquatic life and determine the best velocity to allow your filter to create the necessary water current speeds.

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When the Water Current in Your Aquarium is too Strong

It is easy to determine when the water current and flow generated by your filter are far too strong for your aquarium inhabitants. In addition to researching your fish’s variations in the required conditions, you must also study their behavior as well. For instance, aquatic life struggling to remain still in a fast moving current is a strong indicator that you must decrease the levels of filter flow. Likewise, a darting, more excitable fish might welcome the addition of current speed as it suits their active characteristics. You should also take into consideration the movement of the contents within your tank as well. If your planted life appears to tilt in an unnatural position, or if sediments and deposits appear more so on one end of the tank rather than evenly throughout its entirety, this is often a clear indication that your water current might need to be adjusted. Study the characteristics of your aquatic life and the condition of your aquatic environment, and you will be just fine.

How to reduce filter current?

There are numerous ways to adjust your filter current. The most prominent amongst them are adjusting your flow control on your filter’s intake, adding natural elements such as plant life, rock and stone structures, or simply integrating a motor speed control element. If having only one of these methods does not suite your standards, try incorporating all of them! The better you can maintain a sufficient current speed, the healthier and active your fish will be.

How to make an aquarium filter less powerful?

Adjusting the flow control on your filter’s intake is predominantly one of the greatest methods in making your aquarium filter less powerful. Most external filters are equip with this setting, allowing the owner housing the aquatic life to adjust accordingly. If you feel that your filter is generating too much power, just turn the knob, and the water flowing into the filter will decrease. Adjust to your preferred setting, and all will be well.

Can slow moving fish still survive in fast water currents?

When a slow moving fish is forced to exist in a rapidly moving environment, their probability of survival is extremely limited. Naturally, a fast moving current will impede the ability for the fish to obtain food and create distress in their bodies, as they were not intended to exert this level of energy. Slow, less aggressive fish would survive for a while in fast moving currents, but eventually, they would succumb to the harsh reality evolution had not intended for them to endure.

Can plant life and added structures be effected by the speed of water currents in your aquarium?

Plant life and added structures are often not effected greatly by the speed of water currents in your aquarium. The most that will occur is movement in positioning of either the plant life or structures you’ve inserted. However, the movement can affect your aquatic life either positively or negatively. Because plant life and structures create barriers to shield slow moving fish from the harsh current speeds, movement can disrupt this necessary feature. If your aquarium is houses these kinds of fish, it is imperative that you take notice of the movement so you can adjust for the insurance of your aquatic life’s survival.

What if the aquarium houses aggressive and slow moving fish?

If your aquarium houses aggressive and slow moving fish, it is recommended that you moderate between each setting of fast and slow water currents generated by the filter. Of course, you must first integrate plant life and rock structures for your slow moving fish to take solace. Once you are satisfied, designate time for the aggressive fish to thrive in their rapid moving streams, and subtly decrease the filter power to accommodate the slow movers. This will ensure that each kind of fish continues to thrive and flourish in your aquarium.

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