Betta Fish Rot

[smurfthebetta]

Hello I'm pretty new to keeping fishes. My tank is 3.5 gallons without a filter. I have had my betta for almost half a year now and I recently realised that he developed fin rot. The only medication I could find was Myxazin (Waterlife Fin Rot and Ulcers). I just added a dose for today. Just want to check if there's anything else I can do for him? Will having no filter affect how the medicine work?

 

[Salty&Onion]

I'm afaid that bettas do need filters in the tank and atleast a 5 gallon tank, though ideally a 10 gallon would be much better.
Yes, having no filter will affect your fish's health as there is nothing to remove toxic ammonia and nitrite compounds from its water.
Fin rot is caused by poor water quality. Please test your water and tell the results.

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Fin rot can be treated by regular water changes and aquarium salt.

 

[Colin_T]

You can keep fish without filters but they do better with an established biological filter in/ on the tank.

Fin rot is caused by poor water quality and lots of rotting organic matter in the aquarium, which encourages bad bacteria and other microscopic organisms to grow and damage the fish.

As mentioned, the easiest way to treat fin rot is by doing a 75% water change and gravel cleaning the substrate every day for 2 weeks.
Make sure any new water is free of chlorine/ chloramine before it's added to the tank.

You can add some salt too if required. Add 1-2 heaped tablespoons of rock salt, sea salt, or swimming pool salt for every 20 litres (5 gallons) of tank water. Keep the salt in the tank for 2 weeks.

When you do the daily water changes, add salt to the new water before adding it to the tank so the salinity (salt level) in the tank remains stable.

After 2 weeks, stop adding salt and dilute it out by doing 20% water changes each day for a week. Then do a 75% water change 2-3 times a week from then on so the water remains clean.

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Most chemical medications are designed for aquairums with filters so you should be wary about using them on a tank without a filter.

 

[smurfthebetta]

Can I use normal salt or do I require aquarium salt?

 

[Essjay]

If the salt had additives such as iodine or anti caking agents, don't use it. It must be just salt with nothing added. Aquarium salt is just salt, but if your table or cooking salt is free of additives you can use that.