Dear Colleen, at this point it sounds like you've solved the ammonia problem but the beta's slime coat is probably gone due to the frequent water changes. The slime coat is exactly what it sounds like but it's also a dual action barrier against chemicals and bacteria/fungi/parasites and a reservoir for the good bacteria the beta's (and other fist) need to be healthy.
So I'm not sure if you're still having problems but if this is fin rot or due to ammonia toxicity I'd recommend the following.
- Ensure that you are treating the water. Most tap water is treated for humans and contains chlorine which can cause major damage to these little guys. ((See #5 if not))
- Shine a light on him, preferably a cell phone LED flash. If you see flecks of goldish color he has a fungus that responds very well to most fungal treatments from your local fish store. Don't use this if he doesn't have it as it can also inhibit beneficial bacteria growth. If you see white then he most likely has ick. If he does have ick DO NOT TOUCH HIM, get an ick treatment, and if you have any areas of your body that have white/red itchy patches contact your primary care physician for a treatment. Ick is very contagious so if you do see this please be careful. However with all the water changes the likelihood of either of these is small.
- Stop the bactricin as this is most likely NOT a bacterial infection, especially if it's on his scales and surface of his body.
- Stop the 100% water changes if the strips say that the levels are low, stick to every other day unless you're treating with the fungal, ick, or bacterial medications. Also move to a 20-25% water change instead of 100%. Be sure to test the water before you change it and then wait 2 hours for the water to cycle properly. Also keep that filter ON so we can get some good bacteria growing.
- Get stress coat. I know that some people don't like it but it can help especially in these cases. In a 10g tank it's usually 1ml per 5g but read the labels. More on this in a moment.
- Get freshwater salt. It sounds insane but think about it. He basically has sores all over his body that can become infected with bacteria and fungi very easily. Be sure to only use about 1teaspoon for every 5 gallons, less is more esp. with Beta's.
Now about the stress coat. My first beta had a similar problem when I first got him. My school (in college) had very high levels of Chlorine and fluorine in the water which was causing fin rot, not to mention he contracted a fungal infection also most likely from the water (I stopped drinking the tap water and was amazed at how much better I felt). Stress coat helps to replenish your fish's natural slime coat and can ease transition into a more stressful situation. This also helps when there is damage to the fins as unlike humans the webbing between each spines (and even the spines) on their fins CAN regrow if given the proper care. The slime coat is the first step to this process.
When doing your next water change in half of the water put the proper amount of the stress coat for your 10g tank. Most stress coats solutions also treat the water for chlorine so be sure to NOT add salt to this portion of the water. If your solution does not also treat the water add the treatment for your full water change now.
To clarify:
On the first change IF the stress coat treats the water:
add enough stress coat for the entire water column so you're treating 10g in this case. This will be more Chlorine treatment than needed but that isn't important.
This all goes in 1/2 of the water to be replaced so about 1.25g if you're doing a 25% water change.
On the first change IF the stress coat does NOT treat the water:
Add enough stress coat for the entire water column, again 10g is being treated.
Add enough water treatment to treat ONLY the amount of water you are adding to the tank.
This all goes in 1/2 of the water to be replaced so about 1.25g if you're doing a 25% water change.
At the same time put in another container put the other half of the water. Let it stand while we let the stress coat do it's thing, this should take about 1-3 hours. Right before you want to add the second half of the water add about 1 teaspoon of freshwater salt to the water and stir it until it dissolves completely, DO NOT ADD ANY UNDISSOLVED CRYSTALS. Also do NOT add any treatment for chlorine to this water. Now most people will yell at me for saying this to you but I have science to back me up here.
Chlorine is actually not very stable in water. After 1 hour about 1/2 of the Chlorine that is in our tap water will dissipate into the air. This is because it binds to the molecules in our air. If you have a bubbler you can speed this process up but it's not a necessity. However, Flourine (if you're in the US or a country that adds this to their water) is more hardy and will remain. We compensate because the first half of the water has enough treatment to treat BOTH halves.
The point of this is to help replenish any electrolytes that are lacking and to treat and prevent infections from taking place while recovering. The excess treatment will take care of the chlorine quickly enough and in the mean time the freshwater salts will help your fish.
At this point if you're beta is still alive it is best to STOP using chemicals as much as possible. So after this water change you need to add just enough stress coat to treat the water being removed (so for a 25% change it would be 2.5g treated) along with the dechlorination. The salt does NOT evaporate out and you usually don't need to add much more as it can be detrimental. I add 1 teaspoon every other week with a 25% water change to help prevent any infections from taking root and replace minerals our tap water doesn't have that the fish need.
After a week of the stress coat + treatment (if not included in stress coat) stop using the stress coat to avoid over medicating your beta as too much can harm the gills. You can use it again if you see the fin rot worsening but hopefully by this point it will have begun to heal. I will warn you to wait it out the next week (the stop stress coat week) because it may look like the rot is getting worse but in reality that is the slime coat being restored and the fin beginning to heal. Stress coat has aloe in it (most brands) which while helpful in treating wounds can damage the gills. Luckily beta's are lungfish and their gills while important don't have to be fully functional for them to survive.
A word though, the fins of beta, while they can be healed will take a long time and may never fully heal to the state they were before the rot set in. I wouldn't beat yourself up too much about this as it's your first fish and the pet stores don't educate people enough. Next time you can choose to cycle the tank first but beta's are usually fairly hardy.
If you do loose this beta don't dump the water if you get the fish out quickly. If it's more than 30 minutes dump it but otherwise treat with the antibacterial and do a 50% water change the next day, then let the tank cycle fish less for a week or two, until the ammonia levels are within your test strips safe zone. The only time that I would not recommend doing this is if your beta succumbed to dropsy. Dropsy is a rather mysterious disease among betas and I've lost two to it so far. Towards the end you will see their scales sticking out from their body and they will be bloated, almost looking like a fish porcupine. There is some evidence that epson salts and freshwater salts at higher doses can help draw out some of the liquid and cure it but it's very circumstantial. Dropsy is usually a death sentence though, BUT do not be discouraged. As I said I lost two beta's to dropsy and both were in very good health, they just swelled up and kicked the bucket.
I hope your little guy is still around and doing better, and that my advice is helpful.
- AJ