Fish Dieing
- Thread starter Lewisc53
- Start date
How many gallons is the tank as it would help alot.
If water stats are good it's not a water quality issue if you say ammonia and nitrite are 0.
If the fish are not showing signs of flicking and rubbing or excess slime it dosn't sound like a parasite involved. So the white patches are soundling like columnaris.
If water stats are good it's not a water quality issue if you say ammonia and nitrite are 0.
If the fish are not showing signs of flicking and rubbing or excess slime it dosn't sound like a parasite involved. So the white patches are soundling like columnaris.
It's a 13 gallon tank and the ammonia and nitrite are fine and no signs of flicking or rubbing.
I only saw a white patch on one black molly and I think that's died now or it's gone. Do you think it could of spread? But none of the other fish have white spots.
I only saw a white patch on one black molly and I think that's died now or it's gone. Do you think it could of spread? But none of the other fish have white spots.
So you have all these fish in a 13 gallon.
5 Black Mollys
1 Silver/White Molly
2 Orange Platys one with a black tail
4 Black Widows tetras
4 Rummy Nose tetras
1 Cardinal tetras
3 Red-Eye tetras
1 Dwarf Plec
1 Tiger Barb
That's all of them I think.
I would just preform some water changes for now.
What filter are you using.
I can't see water quality being good with all those fish as it overstocked.
5 Black Mollys
1 Silver/White Molly
2 Orange Platys one with a black tail
4 Black Widows tetras
4 Rummy Nose tetras
1 Cardinal tetras
3 Red-Eye tetras
1 Dwarf Plec
1 Tiger Barb
That's all of them I think.
I would just preform some water changes for now.
What filter are you using.
I can't see water quality being good with all those fish as it overstocked.
It's a nutrafin master test kit, had the kit for about two years and can't fine the expiry date.
We've had the tank it for two years with this many fish and hardly any fish have died up until we get NEW fish from the shop then they all of a sudden starting dieing.
We've had the tank it for two years with this many fish and hardly any fish have died up until we get NEW fish from the shop then they all of a sudden starting dieing.
if you dont quarantine new fish then you will get problems with the new fish bringing in all sorts of diseases...also...the tank has set up so its running fine with what fish you had then suddenly youve added more to the bio load which in turn has to try and keep up. With the tank too small and possibly the filter too its having a hard time keeping water good. I suggest you buy new testing kits..2 years is too long, normally id say 6 months and re stock on them.
as for the fish now, sounds bacterial to me, so thinning out population and adding bacterial meds may help short term..long term less fish or bigger tank.
13 gallons can maybe take around two mollies and a few of the smaller fish up to a max of maybe 8 fish total, but thats dependant on filtration.
I know you say youve had lots of fish for 2 years, but you are lucky you havent had problems...or maybe that luck just ran out.
as for the fish now, sounds bacterial to me, so thinning out population and adding bacterial meds may help short term..long term less fish or bigger tank.
13 gallons can maybe take around two mollies and a few of the smaller fish up to a max of maybe 8 fish total, but thats dependant on filtration.
I know you say youve had lots of fish for 2 years, but you are lucky you havent had problems...or maybe that luck just ran out.
TigerIssey
Queen TI
If problems started when you added new fish this will be the reason.
You start a tank with juvenile fish, the fish grow, the tank is overstocked, the fish you have gradually acclimatise to the bad water quality in the tank, you add new fish, they cannot cope with the conditions in the tank, they start to die, then you want to know what has happened.
You are really overstocked, it is a wonder that the present fish are still alive, no way you could expect additional fish to survive in there. That is heavy stocking for a 20g tank let alone a 13g, you also have a plec, what is the name of this type of plec, as there is not a species called Dwarf. Plecs of any description are large waste producers that 10% water changes weekly will not suffice, I know, I have 3 different size BN plecs and a Queen Arabesque in a 55 gallon, I am doing at least 25% weekly or fortnightly. 10% is no way enough to dilute Nitrates produced by the bioload you have, your old fish will have adapted to this Nitrate level, new fish will not and it does kill them.
The water condition stress probably induced white spot or columnaris on the fish which will have killed them. It can also kill the older fish if the bioload increased too dramatically, high nitrates will have become extremely high nitrates.
Just because fish have been fine does not mean it is ok to keep at least double the recommended amount of fish in too small a tank.
The only way you will save fish is to take some to a local LFS and reduce the amount of stock in there.
You start a tank with juvenile fish, the fish grow, the tank is overstocked, the fish you have gradually acclimatise to the bad water quality in the tank, you add new fish, they cannot cope with the conditions in the tank, they start to die, then you want to know what has happened.
You are really overstocked, it is a wonder that the present fish are still alive, no way you could expect additional fish to survive in there. That is heavy stocking for a 20g tank let alone a 13g, you also have a plec, what is the name of this type of plec, as there is not a species called Dwarf. Plecs of any description are large waste producers that 10% water changes weekly will not suffice, I know, I have 3 different size BN plecs and a Queen Arabesque in a 55 gallon, I am doing at least 25% weekly or fortnightly. 10% is no way enough to dilute Nitrates produced by the bioload you have, your old fish will have adapted to this Nitrate level, new fish will not and it does kill them.
The water condition stress probably induced white spot or columnaris on the fish which will have killed them. It can also kill the older fish if the bioload increased too dramatically, high nitrates will have become extremely high nitrates.
Just because fish have been fine does not mean it is ok to keep at least double the recommended amount of fish in too small a tank.
The only way you will save fish is to take some to a local LFS and reduce the amount of stock in there.
Thanks for that, I'll try and get some bacterial meds for the tank 
and I if I get a new test kit, I'll get one that I'll actually use more, I haven't used half of what's in the master one.
It's my dad's tank so he's the one who will decide what to do so I can't do much unless he does, and I think he doesn't think it's overstocked.
and I if I get a new test kit, I'll get one that I'll actually use more, I haven't used half of what's in the master one.It's my dad's tank so he's the one who will decide what to do so I can't do much unless he does, and I think he doesn't think it's overstocked.
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