Dying guppies?

Question

I have a tank that's 8 weeks old. Everything was fine until about 2 weeks ago when the fishes started dying. I had 2 males 2 females. THey all died one by one. The first 3, I have no clue what happened. They seem to die after I did a water change even though I added de-chlorinizer. The last one to die had open soars on the side and some white film seem to cover her body. I used some medication and she seemed to be bouncing back however, I did a 20% water change last night and she was dead this morning. I've done water changes before and nothing happened until about 2 weeks ago. In the tank, I also have an algea eater. He seems ok for now. Seperated by a net, I have 15 baby guppies. All of them seem ok. Other than one fish, I don't know what killed them and I don't know what to do with the babies. I was in the process of setting up a new tank to seperate the females from the males. Should I transfer them or leave them in there ?

Answer 1

is your tank completly cycled? the film and white spots is a disease before adding any more fish I would treat and quarentine the tank

Answer 2

Well, it sounds as if you had some disease going on. Fungas and possibly a secondary bacterial infection. You need to be treating for this...there are great broad spectrum medications out there. I would NOT move any fish from the tank they are in, as you could just transfer the disease to the other tank. Make sure the meds you were using were right for the kind of disease. Most meds require you to treat for at LEAST 3 days, depending on the medication. Sometimes you have to retreat. Sometimes, some fish will die anyway.
I would just make sure you have the right medication. That you are using proper dosage. That you are using the right amount of dechlorinator, that you have enough circulation. You can try adding some aquarium salt, or even marine salt( I use that for my guppies)
Keep up with regular water changes. Check your amonia, nitrates and nitrites.
Normally these things are not just black and white. Usually disease starts before you ever SEE it, with poor water quality which can be caused by a # of things.
I wouldn't set up another tank, until you get this one all straightened out, and your fish are healthy, etc.

P.s....if your filter uses carbon..always remove the carbon when treating with medications, as the carbon will just pull out your meds.

Answer 3

It sounds like it could possibly be Ich disease. It will cause sore spots of the fish and can kill them.
When you change the water, set the water out for 24 hours so the water can stablize. Then add fish to the fresh water. Make sure you acclimate the fish to the new water first.
Good luck!

Answer 4

Check your nitrate levels. Most likely you have a build up of nitrates.