10 Ways: How To Reduce Ammonia In A Fish Tank Quickly

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If you have an ammonia problem in your tank you should be worried, ammonia is the most harmful toxin for your fish and you need to fix it fast.

So rather than waste your time with the science behind it, here are 10 things you should do right away if you have an ammonia spike in your tank.

10 Ways To Reduce Ammonia In A Fish Tank Quickly

  1. Immediately do a 50% water change
  2. Vacuum your gravel
  3. Remove any uneaten food
  4. Remove any rotting plants
  5. Look for any dead fish
  6. Ensure your filter isn’t clogged and it is flowing freely
  7. Cut down on feeding
  8. Make sure your tank isn’t overstocked
  9. Use ammonia removing pellets in your filter
  10. Keep doing water changes every day/other day until ammonia drop down

If you do all of these things you should start to notice an improvement within a day or two.

If the problem persists then continue to perform water changes and the steps noted above until you notice an improvement.

We will go into each step in more detail below, but first watch this short video that will give you a better understanding of ammonia problem.

Watch: How to Control Ammonia in a Fish Tank


From Howcast

How to Reduce Ammonia in a Fish Tank Step-By-Step

Step 1) Immediately Do A Water Change

One of the first things you should do when you notice that your ammonia levels are high is to perform a 50% water change.

The water change won’t remove all the ammonia, but it reduces the amount by adding clean water which will allow your biological filter to catch up.

This is all part of the nitrogen cycle and you can click here to see 5 Fundamentals Of The Fish Tank Nitrogen Cycle explained in an easy to understand infographic.

5 Fundamentals Of The Fish Tank Nitrogen Cycle

Step 2) Vacuum Your Gravel

Overtime fish waste and uneaten food will accumulate in your gravel and start to produce ammonia.

When you complete your water change its a good time to also clean your gravel.

Step 3) Remove Any Uneaten Food

Each time you feed your fish be sure to remove any uneaten food floating around or any large uneaten chunks on the bottom of the tank.

Step 4) Remove Dead Or Rotting Plants

Just like fish waste, rotting plants will also produce ammonia so remove any dead or rotting plants as soon as you notice them.

Keep this in mind: If you have just set up a new tank every new tank will have high levels of ammonia at first, this is okay, it’s all part of the nitrogen cycle as baceteria is building in the filter media. If you just set up your tank the best thing to do is wait for your tank to cycle.

Step 5) Remove Dead Fish

If you have a large community tank with lots of hidding places, it can be tough to notice dead fish.

But if you can’t seem to keep your ammonia levels down, I would suggest looking under some rocks, you never know what you might find.

Step 6) Unclog Your Filter

Your filter is one of the most important pieces of equipment in your tank. The filter is where your beneficial bacteria will grow. This bacteria is what breaks down the ammonia so that your tank can cycle.

If your filter is clogged and water isn’t flowing freely over the bacteria, then the ammonia will not be broken down to less harmful nitrites and you may experience an ammonia spike.

Check your filter tubes, cartridges, media and impellers, if needed clean your filter.

Step 7) Cut Down On Feeding

If you have an ammonia spike your fish may become lethargic and likely not eat as much, take this time to cut down on feeding.

Try to feed your fish only once per day and ensure all the food has been eaten. Anything left behind will just add to the ammonia levels.

Step 8)Make Sure Your Tank Isn’t Overstocked

Sometimes beginners will add too many fish, too fast.

When you have too many fish, the bacteria that is building up in your tank hasn’t established itself and simply can’t keep up with the amount of waste produced by the fish.

Add fish slowly and allow your the beneficial bacteria to develop over time.

Step 9) Use Chemicals (Band Aids)

If you do all of the above and still have an ammonia problem you can start to add chemicals like ammonia-removing pellets to your filter.

Another good product is Seachem AmGuard which can be used for emergency situations and good for up to 48hours.

Keep in mind that chemical fixes are only temporary and you should still try to find the root of your ammonia problem. It’s likely overfeeding, overcrowding, biological filter hasn’t developed or your filter is clogged.

Step 10) More Water Changes

If all else fails, continue to do water changes every day/other day until the ammonia levels drop down.

By | 2017-04-27T09:01:11+00:00 October 3rd, 2016|Aquarium Maintenance|Comments Off on 10 Ways: How To Reduce Ammonia In A Fish Tank Quickly

About the Author:

Jack Dempsey has over 20 years of experience with freshwater aquariums, his goal is to help beginners avoid the biggest mistakes when getting started. If you find something helpful please share it on your favourite social network. If you need help with anything send Jack a question.