Calvus Die off

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Dobsie

Feeder Fish
MFK Member
Apr 13, 2010
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Far far away land
I had a great stock of F1 Zaires all kick the bucket. I was doing a water change and don't know what happened. I had all ten floating after an hour. I have no idea why either. I made sure the water was the same temp like always and added prime. Its a 125 and I was doing one of the bi weekly changes of 15 gallons. My frontosas, Julies, Leleupis and Peacocks are all fine. This is horrible.
 
Sorry to hear about your loss. They are such beautiful fish.

I've had a similar dilemma.

I've had 5 Black Congo, and 5 Inkfin for about 4 months now. They were roughly a little over 1 inch when I got them.

Every time I do the water change, 1/3 of 75 gallon tank, all of them but 1 good size male Black Congo would lay down on the bottom of the tank almost motionless for an hour or so.

After that they all seem to revive one by one. The smaller ones are taking more time than the bigger ones.

The one which is not affected by the water change, is acting normally like the rest of the fish in the tank (Lamprologus Leleupi, cylindricus, tret ...).

That whole ordeal makes me scare to change the water. Just like you, I use Aquachem to detox, and the temp is pretty closed to the tank's temp.

Anybody know: Would they get better when they get bigger?

What else one can do to make the water change less harmful to Calvus?

So far, fortunately for me that none is dead yet, but it's just like playing Russian Roulette. Reading your post scare the crap out of me.

I hope one day you would find the strength to get them and try again.

SM
 
calvus and comp's are very very sensitive to water chemistry. Its better to do frequent (read: daily or every other) small water changes like 5 to 10g to shift the chemistry of the water as little as possible.

I lost alot of comps before I learned this.
 
prcdslnc13;4487650; said:
calvus and comp's are very very sensitive to water chemistry. Its better to do frequent (read: daily or every other) small water changes like 5 to 10g to shift the chemistry of the water as little as possible.

I lost alot of comps before I learned this.

I didn't think 15 gallons twice a week from 125 gallon tank was that much. I guess I was wrong. I've had the original batch for 6 months with no problems this way and bam. I will probably get some more, but not until I move in December. My house I am building will be finished then and I don't want this to happen again when I move.
 
that shouldnt really effect your water chemistry at all. Have you checked the water out of the tap? Everyonce in a while a member here gets water out of the tap that is far higher in nitrates and nitrites then would ever be in the tank. This can happen if things dont go right at the water treatment plant.
 
prcdslnc13;4489662; said:
that shouldnt really effect your water chemistry at all. Have you checked the water out of the tap? Everyonce in a while a member here gets water out of the tap that is far higher in nitrates and nitrites then would ever be in the tank. This can happen if things dont go right at the water treatment plant.

That could possibly be what happened. I never thought about that.
 
swk;4489770; said:
Are you adding buffer and/or salt to your tank?

I never add any buffers to any of my tanks the ph from tap here is a little over 8 any ways. I do add prime and a little aquarium salt with every water change thats all I add to the water.
 
I always add a double dose of prime in the tank and havent had any problems. I do 75% water changes in my 72 bow once a week!
 
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