Hey, I'm new to this forum, and I was hoping I could get some advice on redoing my aquarium.
I currently have a 29 Gallon aquarium glass tank. I started out with a couple of fake plants, and used a zebra danio to cycle the aquarium, and later on added 3 more of them. There were absolutely no problems. I gradually added neon tetra's to the tank as well, 1 a week until i got to 4. The neon tetra's were fine as well. 1 month later the trouble started. One of my zebra danio's got some kind of disease. His stomach area kind of caved in slowly, and he had fin rot. Next it happened to my other Zebra danio's and eventually , in 3 weeks, all my danio's were dead, and I was left with 4 neon tetra's. These neon tetra's were next. Soon, after a month, the exact same thing happened to my neon tetra's. I kept changing the water every 2 weeks, but the fish would still die. I did about 2, 50% water changes because I read that water changes should be able to get rid of many diseases. Unfortunately that didn't solve the problem. Over the next month those fish died, and now I'm left with an empty tank.
I don't know exactly what mistake I made, but there is some bacteria in my water that is killing off even the most hardiest of fish. So my first step for getting my amazon biotope aquarium is to rid my tank of this disease. I still remember how the last fish looked when it died, it's stomach area kind of caved in, it was VERY skinny, even if I fed it (I did not overfeed, or underfeed), it's fins had fin rot, and its eyes kind of bulged out. Im not exactly sure what disease it is, but it looks similar to neon tetra disease or Fish TB. Either way, I don't think medications will do the job, so Im going to try and start over.
The only problem is how do I do that?? I've heard that one way is to put all your decorations in boiling water, but then I read the post about boiling rocks, and I don't feel safe boiling my gravel. I've also read somewhere that chlorine works, but im not sure if that would get it done. Anybody have experience with this??