Fish keep dying every two days. Thought tanks was cycled.

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So basically you're reading all 0 across the board??? That sounds to me like an un-cycled tank especially if you dont have any live plants...

Also, you mentioned washing all your stuff before placing it in the tank, did you also wash all your filter media before putting it in as well???
When I got the first fish I did not was the filter as I had transferred the fish from the tank to another tank thinking it was cycled. But after the first fish died in the new tank I did was the filter. I had anothjer thought, as theother tank is well established sould I take some of the water from the established tank and place it in the newer tank. I did take a little of the substrate from the older tank and put it in the new tank.
 
So basically you're reading all 0 across the board??? That sounds to me like an un-cycled tank especially if you dont have any live plants...

Also, you mentioned washing all your stuff before placing it in the tank, did you also wash all your filter media before putting it in as well???
When I got the first fish I did not wash the filter as I had transferred fish from the tank to another tank thinking it was now cycled. But after the first fish died in the new tank I did wash the filter. I had another thought, as the other tank is well established should I take some of the water from the established tank and place it in the newer tank before putting another fish in. I did take a little of the substrate from the older tank and put it in the new tank.
 
Okay, im a little confused so tell me if this break down sounds right...

1. You had the fish in tank A while tank B was cycling

2. When you thought tank B was cycled you added the fish from tank A to Tank B

3. When fish started dying in tank B you then cleaned the filters in tank B hoping to save the remaining fish inside?

So my question then would be how did you cycle tank B exactly? What methods was used???
 
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Also forgot to mention, transfering old tank water from tank A to tank B is not going to do much except technically pollute the water in tank B...

Benificial Bacteria grows on the surface of items such as filter media / wood / rocks / substrate... the water itself doesnt actually help all that much...

Clean water that has been treate for cholorine / chrolormines would be better, just try and match temps as close as possible or fill very slowly so fish can adjust to temp...
 
One of the easiest things you can do is:

If your old tank is/has been cycled and it has more than one filter running on it, you can simply move one of those filters because over to the new tank. The new tank will grow enough bacteria in the other new filters to handle the bioload in short time.

The downside is that your old tank will be missing some biofiltration. You could add a new filter with new media to it and it may only experience a mini cycle.
 
Okay, im a little confused so tell me if this break down sounds right...

1. You had the fish in tank A while tank B was cycling

2. When you thought tank B was cycled you added the fish from tank A to Tank B

3. When fish started dying in tank B you then cleaned the filters in tank B hoping to save the remaining fish inside?

So my question then would be how did you cycle tank B exactly? What methods was used???


I know it sounds confusing but perhaps if I refer to my established cichlid tank with several flourishing fish and 120 gallons as A and the tank where my fish keep dying as Tank B, it will help. About two months ago I had an angel fish and a tetra in tank b. I then moved these two fish to Tank A with 4 large roktiel severum, pleco and 4 corys I had there. This left tank B empty for about two weeks when I decided to get a single flowerhorn for that tank. Even though I had no fish in it I had the filters running while it was empty. At that point I put my first flowerhorn fry in it. It died after two days. Then a few days later I tried another flowerhorn and it too died in a couple of days. Then I tried a small Oscar and the result was the same. Each time I had the water checked at the store and it was fine. I then purchased two different flowerhorns and they too ended up dying after only a couple of days. Finally, I read up on cycling tanks and decided to go through a fishless cycling process before I bought my next fish. I put some food in the tank over a couple of days and got the ammonia and nitrites up When they they came down to zero and some nitrates were in the water I did a 50 percent water change. Everything was a zero now. So I decided to try again with flowerhorn fry. The first one died after a day and its replacement initially was swimming around and seemed to be eating its first day in the tank but it too died on the second day. Before the last two died I took some of the substrate from tank A and put it in the tank B before I started the cycling process. Prior to the cycling process in tank B the water appeared a little cloudy but after I completed the process the looked pristine. Hope this helps you understand what is going on. Besides being out a good amount of money it troubles me to see so many fish die.
 
One of the easiest things you can do is:

If your old tank is/has been cycled and it has more than one filter running on it, you can simply move one of those filters because over to the new tank. The new tank will grow enough bacteria in the other new filters to handle the bioload in short time.

The downside is that your old tank will be missing some biofiltration. You could add a new filter with new media to it and it may only experience a mini cycle.

This may not be as big of problem as it seems. As both filters are large enough by themselves to handle the tank. The only problem is I started another cycling process in the new tank using ammonia. Would it create more problems if I switched the filters in the middle of the process.
 
This may not be as big of problem as it seems. As both filters are large enough by themselves to handle the tank. The only problem is I started another cycling process in the new tank using ammonia. Would it create more problems if I switched the filters in the middle of the process.

Okay, now that paints a lot more cleaer picture for me...

I would therefore recommend the following:

if tank A has two filters running, take one of them and replace it with one of the filterd from tank B, coz you know tank A filter has enough BB to support fish...

If it only has one filter, then take some of the media (such as bio rings) out of tank A filter and place it directly in tank B's filter to kick start a new BB colony asap...

Also i think your problem initally was that you left the tank running for 2 weeks with no fish in it, therefore killing off any BB because there is no food source for it to live off... then when you did go and add new fish in, the tank was basically un-cycled or un-fit to support fish...

Fishless cycling also does work but i've not done it personally so cant really comment if it was done correcrtly as i've always taken more media than i need to start up new tanks and pretty much stock the tanks right away...

Anyway, thats my 0.2 cents on what i think happened :)
 
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Okay, now that paints a lot more cleaer picture for me...

I would therefore recommend the following:

if tank A has two filters running, take one of them and replace it with one of the filterd from tank B, coz you know tank A filter has enough BB to support fish...

If it only has one filter, then take some of the media (such as bio rings) out of tank A filter and place it directly in tank B's filter to kick start a new BB colony asap...

Also i think your problem initally was that you left the tank running for 2 weeks with no fish in it, therefore killing off any BB because there is no food source for it to live off... then when you did go and add new fish in, the tank was basically un-cycled or un-fit to support fish...

Fishless cycling also does work but i've not done it personally so cant really comment if it was done correcrtly as i've always taken more media than i need to start up new tanks and pretty much stock the tanks right away...

Anyway, thats my 0.2 cents on what i think happened :)
 
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