My daughter was gifted with two males bettas this past Saturday in a .5 gallon tank. I did a bit of research and bought a 10 gallon tank, lighted hood, filter and heater ASAP which was unfortunately yesterday. I conditioned the water with Top Fin Betta Water Conditioner and rinsed the tank and everything that was going in it with hot water prior to adding the fish and made a DIY divider. Both of the bettas seemed fine at first but as time passed the red betta became lethargic and around 11PM I noticed some white cottony patches on him. If I'm correct it was a fungal infection. Since we don't have anything on hand to treat the fish I was planning on running out this morning and going to the pet store but when I got up he was swimming around quite erratically then swam to the bottom and went sideways. After about 5 seconds of no movement I fished him out with the net and to check on him but it was too late. Blue seems happy, no patches on him and no clamping. He's active and eating.
I know I've done pretty much everything wrong but I didn't have a chance to do any research prior to getting these guys. What worries me now is whether or not what Red had is contagious and if so what should I do? I'm going out to the store to get a water test kit and a siphon but if there's anything else I need to fix what's going on in the tank now or just something I should have on hand please let me know.
I don't know anything about fish except what I've learned from the web since Saturday so any advice is greatly appreciated. I feel bad about the poor guy not making it and really want Blue to live a long, happy life.
What size is your tank? 10 gallon
What temperature is your tank? 76 degrees F
Does your tank have a filter? Yes
Does your tank have an air stone or other type of aeration? No
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? Aqueon Betta Pellets
How often do you feed your betta fish? Twice daily
How often do you perform a water change? None yet
Have you tested your water? If so, what are the following parameters? No
Symptoms and Treatment
How has your betta fish's appearance changed? White cottony patches, clamped fins
How has your betta fish's behavior changed? Lethargy, occasional erratic swimming
When did you start noticing the symptoms? Approx. 11PM last night
Have you started treating your fish? If so, how? No
Does your fish have any history of being ill? Unknown
How old is your fish (approximately)? Unknown