Too much flow in reef tanks can be problematic.
It’s important to find the right balance and that’s easier said than done. You need to have a good understanding of how to handle this type of situation without worsening the tank.
There are timing issues that can pop up when it comes to this type of problem.
The signs can include:
- Restless Fish
- Unwillingness to Eat
- Health Problems
It’s best to make sure you take action before things become difficult to manage. This can happen with too much flow in reef tanks because it can become difficult for the fish to sleep at night.
This guide is going to take a look at what you can do with too much flow in reef tanks and how to ensure your solution is a safe one moving forward.
Best Flow Pump for Reef Tank (EDITOR’S CHOICE)
- Suitable for fresh and saltwater, Easy installation and maintenance
- Silent design with Magnetic bracket
- Night sensor - automatically detects when tank lights go out and slows the pump
Last update on 2023-05-12 / Affiliate links / Images from Amazon Product Advertising API
Tips on Handling Too Much Flow in Reef Tank
Tip #1: Cut the Flow at Night
With too much flow in reef tanks, you are going to have to think about the 24-hour cycle.
In most cases, oxygen is not an issue and it’s something fish are going to require to survive. However, it’s important to understand there’s a limit that needs to be maintained because too much of anything is going to have consequences.
In this case, your fish may not feel as safe in their surroundings and that is going to cause them to hide all the time and not eat properly.
You have to find a way to cut this problem down and the only way to make sure that is the case is by cutting the flow at night.
The benefits include:
- Improved Rest for the Fish
- Psychological Benefits for the Fish
- Regulates Flow Better During 24-Hour Cycle
Why is it good to go down this path when it comes to too much flow in reef tanks?
In essence, you are going to focus on the fish and their sleeping schedule. They are going to want to rest peacefully and too much flow in reef tanks can be disastrous to their sleep patterns.
By cutting the flow at night, you give them an opportunity to rest and you better regulate the natural flow in your tank without compromising on oxygen levels.
This is a win-win and an ideal way to go for those who are dealing with this type of predicament.

Tip #2: Provide Cover at the Bottom
Do you have some form of cover at the bottom of the reef tank?
This can be something as simple as aquarium rocks that are settled into the base. The idea is to give fish natural cover that would be seen out in the ocean, if they were dealing with strong flow during the day.
This is a good organic way to make sure your fish also have an opportunity to regulate their ecosystem.
This is a must when it comes to something as subjective as too much flow in reef tanks.
It’s not always a clear-cut number and that’s what confuses fish tank owners. You have to be patient and continue to give your fish options to thrive in the tank.
This is why a couple of aquarium rocks and other similar accessories are the way to go.
Tip #3: Fine-Tune the Water Quality
What about the water quality in your reef tank?
If you feel there is too much flow in your reef tank, it might have to do with the water quality giving issues. Yes, the flow might be high, but what about everything else?
A good, well-established reef tank isn’t going to give you too much trouble even when the flow is high. It’s all about fine-tuning the water quality and making sure your processes (i.e. maintenance) are intact.
When this happens, you are going to realize too much flow in reef tanks isn’t a problem as long as your fish are healthy.
The water quality starting to fade is when the flow becomes a serious problem because it compounds the issue.

Tip #4: Test Different Settings
Testing different settings with your flow pump is never a bad idea.
Don’t become devoted to one type of setting because that’s not how things are supposed to work. There is an adjustment period and you are going to have to test how the flow pump works with your reef tank.
Over time, you are going to realize what works and what doesn’t.
Final Thoughts
With too much flow in reef tanks, you have to take a patient approach and continue to focus on making subtle adjustments.
It’s not about taking out the flow pump and calling it a day!
You need to adjust slowly because oxygen is still important in the tank. The only way it’s going to happen is with the help of a good flow that’s consistent and safe.
Make adjustments, see how the fish react, and go from there.
Here’s more on how to take care of a reef tank and your fish – how to remove white fungus in a fish tank, tips for including snails in a fish tank, how to soften water in a fish tank, and how to add Indian almond leaves in a fish tank safely.