How To Cure Flowerhorn Bloat With Transparent & Stingy White Poop

Flowerhorn Bloat

Flowerhorn Bloat and stingy white poop

I’ve been in the fish keeping hobby for about half a decade now. Some of the fish I kept in the past had these problem. Their stomach got bloated and there was this white, transparent stingy white poop that just hangs out of their butthole. I never knew how to cure it and that caused the fish from dying.

about 2 weeks ago, This disease happened again to my 3 month old Flowerhorn who I love so much and can’t afford to lose. I did a few research to treat him. It worked and I would like to share with you how I did it.

To save you the time on going through this entire article, here’s the basic summary of what you should do:

  1. Identify if your Flowerhorn really has the bloat and stingy white poop coming out
  2. Do not feed it while it’s on treatment
  3. Get a 10 gallon tank (in my case, I just used a 30L plastic box I had lying around)
  4. Add air-stone and cycled filter to the hospital tank. (I used 1 airstone and and a cycled sponge filter which I recommend…)
  5. Add Epsom salt (dosage is 2 table spoons of Epsom Salt per 10 gallons)
  6. Add Metronidazole tablet (Dosage is 250mg per 10 gallons. It’s important that you crush it so it becomes powder-like before putting it on the hospital tank. It will join the water faster this way)
  7. After 24 hours, Do a 50% water change.
  8. Repeat steps 5-6 for 4 days or until the bloat and poop is gone. (in my Flowerhorn’s case, it only took him 3 days to recover)
  9. When you’re sure that the bloat and stingy white poop is gone, transfer him back to his main tank.
  10. this step is optional but I highly recommend. After transfering the fish back to the main tank, I put in Metronidazole in the main fish tank as well.
  11. Lastly, You’ll notice that after this treatment, your fish will become stress and will be scared of you. He will also won’t eat yet. Don’t worry. This is normal. He will be back to his usual self in about 1-3 days. (mine took only 1 day) – To help make your fish become active again and fasten this process, Add vitamins. (I use angeldrops Vita and Angel Drops Super growth)

Step 1: Identify if your Flowerhorn is bloated and has the stingy white poop

You’ll know the stingy white poop when you see it. It sticks out in their butthole for hours. Sometimes it’s transparent looking. For the bloat, simply look if his stomach is bigger than usual. Here’s an image of my Flowerhorn when he was bloated and sick:

Bloated Flowerhorn

Bloated Flowerhorn

Flowerhorn Bloat and stingy white poop

Flowerhorn Bloat and stingy white poop

The white poop is not visible on the image but it’s definitely there. You will also notice that he’s just sitting in the bottom of the tank and will refuse to eat anything.

Step 2: Do not feed it while it’s on treatment

Flowerhorn Hospital Tank 30L (7.9 gallons)

Flowerhorn Hospital Tank 30L (7.9 gallons)

It’s very important that you do not feed him during this treatment. Else, it won’t work. The main reason why your Flowerhorn is bloated is because of a parasite that is blocking something in the stomach. Of course, if he has this abnormality. You won’t find it hard breaking this rule because they simply do not eat if they’re in this stage.

Step 3: Setup a 10 gallon hospital tank

This will greatly help in making the treatment more cost-effective and efficient than using a larger tank. In my case, I just used a 30L = 7.9 gallons transparent plastic box shown below.

It’s important that you add an air stone and a cycled sponge filter in the tank. The air stone will help with circulating the fish medication we’ll be adding and the filter will help with the water quality a bit.

Flowerhorn In Hospital Tank

Flowerhorn In Hospital Tank

Once you have everything above, it’s time to add your Epsom salt and Metronidazole. First, add 2 table spoons of Epsom salt and then follow it with a crushed 250mg tablet of Metronidazole.

Step 4: 50% Water Changes Every 24 hours and Re-add Medication

Hospital tank 50% water change

Change 50% of water in your hospital tank every 24 hours


After 24 hours, you should replace 50% of the water in the hospital tank. After replacing the water, add 1 table spoon of Epsom salt and 250mg of Metronidazole

We want the same dosage of epsom salt however we’d want to increase the dose of Metronidazole. That’s why we’ll add 250mg of it in the hospital tank again. We’ll do this every 24 hours.

Just for additional info, it takes 6 hours for the fish to absorb the medication.

Step 5: Transfer Your Flowerhorn To The Main Fish Tank After Recovery

According to my research, the fish takes about 3-7 days to recover. In my case, it only took him 3 days to fully heal and get rid of the bloat. When the bloat is gone, you can transfer him back to the main tank. I recommend you put Metronidazole in the main tank as well. (but only when he has already got rid of the bloat)

After transferring him back to the main tank, you will notice he’s stress, still refuse to eat and will be hiding and scared of you. This is a normal behavior for fish that has just been transferred and recovered. He will be back to his hungry usual self when the stress is gone and that process usually takes about 1-3 days.

To help fasten getting rid of the “newly-recovered-fish-stress”, I find adding vitamins helps. Also, you should leave him alone for a couple of days. ie don’t look at the fish tank too often.

Below are images of him after recovery. I can say that after he recovered, his appetite went back, his Kok size went back and his color greatly improved. I’m very happy of what I was able to do for my fish. 🙂

Flowerhorn Recovery From Bloat 1

Flowerhorn Bloat Recovery

If you are having the same issue with your Flowerhorn or this post, feel free to ask.

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