Another Fish Death..

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FallenOwl

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AvalancheDave

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What was your water change schedule like?

Have you tested pH or kH?

Nitrate tests are often inaccurate so you could have a lot less or a lot more than 70. Fortunately, nitrate is pretty non-toxic.

Are you using any glutaraldehyde-containing products such as:
Easy Life Easy Carbo
Seachem Flourish Excel
API CO2 Booster
Azoo Carbon Plus
Cidex
Metricide?
 
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FallenOwl

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I haven't tested my ph In a while, it stays the same (high). I have well water, not "city water".
I've never tested kh, I don't have anything that does that..
I also don't use any of those, the only thing that I put in my tanks are:
Seachem Flourish (not excel) - a little less than it says to after each water change (I haven't done it in 2 weeks though)
Tetra-Aquasafe (after each water change
Water changes are once a week (15-25%)
 
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FallenOwl

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Any ideas??
 

Rivermonster

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Any parameters of the well water could of changed, the 50% water change most likely caused it though. Id add the tetrasafe to well water first before adding to tank, temperature match it then add it to tank.
Did you dose for the tank or pro rata to amount of water you changed?
Check the ph of well water and your tank first if am, nitr n nitrates are good.
When you last clean filter? Anything new been added at all ie decor,fish,food,filter- part from flourish?
 

AvalancheDave

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FallenOwl said:
I haven't tested my ph In a while, it stays the same (high). I have well water, not "city water".
I've never tested kh, I don't have anything that does that..
I also don't use any of those, the only thing that I put in my tanks are:
Seachem Flourish (not excel) - a little less than it says to after each water change (I haven't done it in 2 weeks though)
Tetra-Aquasafe (after each water change
Water changes are once a week (15-25%)
Your pH is probably quite stable if you have high kH.

Were any of the deceased fish somewhat new? If so, acclimation may have been an issue.

One other suggestion would be to age your water change water. According to a brief Google search, dissolved gases are a problem with well water. I suggest preparing your water change water in a spare tank or other large container. Fill it with cold water only and bring it up to temperature with aquarium heaters while aerating it to encourage off-gassing. Then refill your tank in stages so that any difference in the water is less stressful to the fish.

Even though I have municipal water, I change water this way though I add dechlorinator and test for chlorine levels. In the winter, quite a lot of dissolved gas comes out of solution when the water is heated. If I had put cold water in the tank, I would have put my fish at risk of gas emboli.
 
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FallenOwl

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I did the 50% water change after the deaths,
The deaths were not all at once, more like 1 a day..
I do temperature match, I give or take 1 degree.
I try to add the aqua safe to the bucket that I'm using to refill, but with bigger water changes I use a python, so the aqua safe is just added to the tank (it's a 55 gallon tank, I add enough for a 40 gallon tank).
A small glo-fish decoration was added 2 weeks ago..
I check the filter every month.
1-2 weeks ago I got 4 Harlequin rasbora, 3 weeks ago I got 4-7 Kuhli loaches (I forgot how many exactly )
I acclimate them by letting them sit for 5 minutes, put a cup of tank water in every 10 minutes (5 times).
I've never had a problem with "off-gassing", but if nothing else is found I will try that.
 
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FallenOwl

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It definitely wasn't the acclimation, a Glofish tetra died today.. They have been in the tank for about 3 months now.
I took the recently added decor out, is there anything else that could be causing this??
 
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FallenOwl

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Another Kuhli loach died today, I'm just going to move the remaining 3 to my 10 gallon baby tank.. Whatever it is seems to be affecting them most.
My DG is also sick, although I don't think it's for the same reason.. I put him in my 10 gallon Qt tank
Is there anything else it could possibly be!??
Edit: I just remembered that I switched substrates about 3 weeks ago, I went from gravel to sand..
 
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FallenOwl

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The DG died in the night..
Another harlequin died this morning-
c5e17ab9900f7bd19594afb1667bee39.jpg
510cab69580f43910ce2a236097cf470.jpg
 
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FallenOwl

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I may have found it!
I was cleaning the filter, trying to see if that was the problem, and it was spray painted!! Somebody before me must have spray painted it to look better.. But on the inside!?? I don't know, I'm trying to get it off now. Hopefully that was it (fingers crossed)
 

bgclarke

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Spray painted the inside of the filter?

If that was me, I'd toss the filter and buy a new one.
Who knows what toxins from the paint may have been absorbed by the filter body.
 
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FallenOwl

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I really don't have the money for another filter..
I'm cleaning it with a small amount of bleach (will be cleaned again to get bleach off).

Edit: Yea! Who does that?? (Painting the inside of a filter)
 
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