Can't keep cory's alive...

Fsh~WithNoEye's

Fsh~WithNoEye's

Fashmaster
Apr 27, 2006
27
0
0
Aberdeen, Scotland, UK
PLEASE HELP...

I have this problem where Cory's just won't live in my tank...
It is a normal 150 litre community tank with nothing nasty in it.

Took a water sample to local fish shop the other day and they said everything was fine, thought it could possibly be that they are not getting enough food.
So waited a week, and bought 3 more...
Day 2 - 1 has died within a day
Day 3 - 1 is looking like its going to die soon, other is look healthy.


If anymore info is needed just ask and I'll let you know..

Thanks in advance,

FSH..
 
Fine can mean lots of things. You need exact numbers. I'd look into getting a drop test kit (like Aquarium Pharmaceuticals master test kit) so you can test your own water. If you have a Petsmart nearby, print out the item page online and they will price match the $14 price, that way you're not paying the ridiculous $30 in store price.

How long has your tank been up and running? How often do you do water changes and how much?

Corys are very sensitive to water quality - any ammonia or nitrites or high ammounts of nitrates (over 40 ppm) and they go downhill quickly.
 
I second that. Please get the exact values of ammonia, nitrite, nitrate. How long has this community tank been running? And what was your water change schedule on this tank? How often and how much per water change? No fish will die with 1 day of hunger so I really don't think its a feeding problem. :dive2:
 
Yea they are scaleless fish. That's why they are also sensitive to meds and salt. They don't have scales to protect them like other fish.
 
Ok,

Will get a test kit and get some figures for you.
Tank has been up and running for around 2 months now.

Initially has 4 cory's.

2 lasted for 1 month and the other 2 lasted 6 weeks..

Now on week 8/9 i decide to try them again, and there dying even quicker...

Was water changing 10% every week, but was advised to cut that down to every 2 - 3 weeks and give the water and filter a chance to get into a true biological state.

The fit and healthy cory is still looking very fit and healthy, no problems with him so far.....

Strange one..

FSH
 
Just out of curiousity, what other fish are in the tank too?

I think that a 10% water change once a week during cycling is too little. The bacteria is meant to change ammonia to its harmless form. When you are cycling, you don't have enough of this bacteria and ammonia spikes are common. That's why frequent waterchanges are important during the cycling period. It is the only way to remove the ammonia. Doing a 25%-40% water change at least twice a week during cycling has usually worked for me. For regular maintenance, I do a 25% water change at least once a week.
 
Hey there, 10% weekly water changes are way too few when doing a fishy cycle. In fact, some even do 25-50% daily to handle the ammonia and nitrite spikes. New tank syndrome is killing your fish. Don't worry about doing "too much" water changes. When doing a fish cycle, the more partial water changes the better chance for the survival of the fish. Don't worry about the good bacteria, water changes will not ruin your establishing colony. Good luck :)
 
But the tanks been up and running for 9 weeks now, I'm done cycling after weeks.....

Fish:
2 x dalmation molly
2 x black molly
2 x pineapply swords
5 x cardinal tetra
5 x green neon tetra
1 x dilver dollar
2 x crib
4 x zebra danio
1 x lepard danio
2 x blue platy
2 x female guppy
1 x gold guppy
2 x neon blue guppie
1 x plec
1 x shrimp
2 x silver tip tetra

1 x panda cory...
 
Hmm... you mean you have ammonia=0 and nitrites=0 right? Have you tried buying from another source? Do they look real healthy when you buy them? :huh:
 
Fish:
2 x dalmation molly
2 x black molly
2 x pineapply swords
5 x cardinal tetra
5 x green neon tetra
1 x dilver dollar
2 x crib
4 x zebra danio
1 x lepard danio
2 x blue platy
2 x female guppy
1 x gold guppy
2 x neon blue guppie
1 x plec
1 x shrimp
2 x silver tip tetra

1 x panda cory...
Click to expand...

What are your water change habits now?

Your tank is a bit overstocked for a 150 liter (40 gallon) tank. That could be leading to possible bad water quality. We'll be able to figuire out more once you put those numbers up.

I believe most plecs can get very large and might outgrow your tank. Do you know what kind of plec you have?
 
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