2 Sudden Deaths

mollylver

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PLEASE HELP

Tank size: 10 gallons

I had the water tested at petsmart yesterday and they said everything was fine.

pH: 6.5
ammonia: ? but fish store said zero
nitrite: 5 ppm
nitrate: 50 ppm
kH:
gH:
tank temp: 78 degrees

Fish Symptoms: Ok, A week ago I noticed that 2 mollies had bent backs. This startled me and I asked about and found paracites to be the likly cause. Went to the pet store yesterday after the first molly died (He had bent back, difficult time swimming, and at the end difficult breathing) and they said no no no all that was needed was a water change. So I did that and just went downstares and found the molly at the bottom dead. I figured that he died of the same thing as the other one. The bizzar thing is that the pregnant molly seems to be completally unaffected by whatever is hurting them. I was very startled to see a tetra floating about as if its swim bladder just failed but it was breathing. We took it out to euthanise it but it started jumping about. We put it back in the tank and it died.

Volume and Frequency of water changes: 30 % weekly

Chemical Additives or Media in your tank: I just added some stress zyme bacteria to reduce the nitrate which was grewing high.

Tank inhabitants: Now four tetra as one just died. 1 pregnant molly (2 just died) and 2 algae eaters.

Recent additions to your tank: The algae eaters are a week old. I know it was going to be overstocked when the algea eaters grew but they are to be moved into my 40 gallon later.


And no I didnt forget to add declorinazor. The chage was yesterday and 4 tetra,1 molly, and 2 algea eaters still are alive
 
Your water stats are not fine you have a nitrite reading of 5 when it should be 0.
If the fish wasn't born with bent spines, old age, fish tb, to internal parasites.
What does it look like when the fish go to the toilet.
 
I don't feed them any live foods so I dont think its paracites. The poo on the first molly that died was red but he hadent eaten in days. The pregnant molly's excrement is normal. I'm at a loss.
 
I'm just wondering if it could be a lack of activated carbon. I'm due for a change but could an extra week w/out it have really killed them? Also, when changing the filter pad, how do I keep the necessary backeria as they will go with the carbon pad?
 
I would ask tolak not sure on your filter pads system.
Yes bad water quality and internal parasites will soon kill a fish.
 
There's really no need to change the filter pad unless it's falling to bits. The manufacturers like you to keep buying their products (oh, cynical me!). Rinsing the filter pads in a bucket of tank water is all you need to do. You don't need carbon either, unless you want to remove medications.
 

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