Hey, guys, so I'm having a huge crisis. All this is explained down below, but it might be confusing (ask me as many questions as you need, I want this figured out and I've got time, now). I've had several fish die over these past few days. First, it was the rasboras. Then, Banana Fish died. I bought some guppies to replace him, and a new betta. All of which also died. And now Phaistos is looking pretty fatal. I really don't want another of my little guys to die, so I'm trying to figure something out. All I can think is that it has something to do with the community tanks at the pet shop I bought the new fish from. But here's the details:
What size is your tank? This is the 20 gallon, but another fish was affected in a brand new 2.5
What temperature is your tank? The 20 gallon sits at 79 the 2.5 was 78
Does your tank have a filter? the 20 gallon, yes 2.5 no. It had only been set up for about two days
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? In the 20, I had the three bettas, and then a snail, and I've had the rasboras and then guppies.
What type of food do you feed your betta fish? They get several different brands of foods, pellets and flakes.
How often do you feed your betta fish? Twice a day
How often do you perform a water change? I get them at least once a week, but I'll admit my smaller, midweek changes have been lacking since I was working two jobs.
What percentage of the water do you change when you perform a water change? I just did a good 70% change at the end of last week. Normally, they get about halfway changes. I did a thorough gravel vacuuming and cleaned all the decorations and the glass and everything
What type of additives do you add to the water when you perform a water change? Prime
Have you tested your water? If so, what are the following parameters? I haven't had the chance, but I intend to tomorrow
Symptoms and Treatment
How has your betta fish's appearance changed? They don't change. I just come home to dead fish. This time, it's Phaistos, and he isn't dead yet. He looks perfectly colorful. He isn't clamped. He isn't doing much of anything, though.
How has your betta fish's behavior changed? He's lethargic, and seems almost dizzy when I try to get him to move.
When did you start noticing the symptoms? Banana Fish died two days ago. He didn't display any symptoms, he was eating fine, he was chasing the rasboras, he was just himself. Then, I came home from KFC and he was just dead. Phaistos isn't dead, yet. He was fine when I got home from work today at about eight. But now, he's lying on the bottom of the tank and he won't be roused.
Have you started treating your fish? If so, how? I'm about to move him into different water. There's another betta I have to move in the tank, as well.
Does your fish have any history of being ill? Banana Fish had to be in ES for weeks upon weeks when I bought him. It had been several weeks since he had used any in his water, and he had been swimming perfectly fine. He didn't seem sick before, and Phaistos has always been healthy and particularly spirited.
How old is your fish (approximately)? Banana Fish was probably about or just under a year old when he died, but I would guess Phaistos is younger, because he was smaller when I bought him. There's also a brand new, unnamed guy who passed last night in the 2.5 gallon. He was tiny, but not a baby. Probably four months old or so.