Betta Fish Forum banner

Possibly fish rot

299 Views 2 Replies 3 Participants Last post by  Taeanna
Hello there.
Background info:

We have a Bioorb 15l with a heater and a filter. 3 days ago we bought our first betta for the biorb, and its the only fish we have. Yesterday we noticed what we think is fin rot, i have attached a picture below:

What size is your tank? 15l
What temperature is your tank? 26 C / 78,8 F
Does your tank have a filter? Yes
Does your tank have an air stone or other type of aeration? Yes
Is your tank heated? Yes
What tank mates does your betta fish live with? None

What type of food do you feed your betta fish? "Tetra Betta"
How often do you feed your betta fish? 1-2 times a day

How often do you perform a water change? I have done 2 out of 3 days when the Betta have been in the aquarium
What percentage of the water do you change when you perform a water change? 20-25 %
What type of additives do you add to the water when you perform a water change? " Tetra Aqua Safe"

Water Parameters:
Have you tested your water? I havent tested, but I believe the cycle have been 100 % complete.

Symptoms and Treatment
How has your betta fish's appearance changed? Second day we had him we noticed some black at his fins, at the end
How has your betta fish's behavior changed? Not changed
When did you start noticing the symptoms? 2. day we had him
Have you started treating your fish? If so, how? We havent
Does your fish have any history of being ill? Not that we know of.
How old is your fish (approximately)?

What would you recommend? Thanks in advance.
See less See more
1 - 3 of 3 Posts
Its a bit hard to tell from the photos if he does have fin rot. But if he does its not bad at all. Fin rot is usually characterized by fins that look shredded and clear and your fish is losing more and more of his fins so it gets closer to his body. But it looks like it could be his fins growing out as well. Sometimes with younger fish when their fins are still growing they have black on the very edge it could also be new coloration. Could you get on of him flaring or at least with his fins open so its a bit easier to see what his fins look like?

A couple of suggestions.

I would switch his food. Tetra betta food tends to contain a lot of fillers and gets your tank dirty pretty fast. The two most recommended brands on this site are Omega 1 Betta Buffet Pellets and New Life Spectrum pellets for bettas. You should be able to find either one at petco, and their good food for your fish :).Plus at least with the omega one since I haven't tried that other one, a small container will last you a long time especialy with just one betta. I would also feed him a bit less. Betta's have very small stomachs but unfortunetly are little piggies so they will eat and eat. Once a day should be fine even every other day will work well for bettas.

My other suggestion is that I would do less water changes. If your tank is cycled then once a week will be sufficient for the tank. To many or to large of a water change can mess with the cycle of your tank.

Also quick question, how long has your tank been running before you put him in and how have you cycled the tank, just to make sure that it is for sure cycled.
See less See more
honestly I cannot see any fin rot, he appears to be growing his fins which is why the edges are translucent with little dark bits, fin rot will start to eat inwards and leave a dip in the nice straight edge of the fin.

If he is a new addition to your family he is likely having his adult growth spurt, fish in the pet store are normally about 6 months old, which is old enough to have their coloring, but not at full size yet. Expect his fins to either have clear bits or possible little white spikes protruding from them as the fins lengthen.
1 - 3 of 3 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.