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unexplained fish death
June 15, 2012
8:35 pm
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JazzBora150
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hi peeps

sadly i had one of my geophagus altifrons die today

nothing at all has changed in my tank in 6 months

with the exception of moving a few plants around

readings in tank

ammonia 0.2

nitrite 0

nitrate 0

ph  7.6

no signs on it of any misbehaving with the others

nor did it have any signs of illness visible

i have noticed one of them flicking against a bit of

wood in the tank but this isnt a constant thing. but

it does suggest an irritant

any ideas guys

June 17, 2012
7:07 pm
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JazzBora150
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^bump^

June 18, 2012
1:00 pm
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coelacanth
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Doesn't quite make sense that you have an ammonia reading but no nitrite or nitrate, it suggests that your filter isn't working properly. In any mature aquarium with appropriately-sized filtration, ammonia should never really be detectable using hobbyist kits, as the conversion into nitrite and then nitrate should happen very quickly. Try a new kit or get a corroborative water test from your local retailer. Unless you are doing massive water changes with 0 nitrate water, it would be very unusual for there to be no detectable nitrate in a mature system, even in our systems which are over-filtered and with minimum 50% weekly water changes there is some nitrate (none measurable in the tap water), but if we had any reading from an ammonia test kit we'd be wondering why we had a problem.

What filtration have you got on your aquarium, and what is your water change regime?

June 18, 2012
7:48 pm
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JazzBora150
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thanks for replying

my test kit is an API one for freshwater

the tank is 72"x17"x22"

my filter is eheim professional 3 (model 2080)

water changes are about 40% per week

i do understand about ammonia with no nitrate

is the a chance the filter has crashed

am i likely to see more deaths :(

also am i likely to be overfeeding. i feed once a day. usually pm

no food goes uneaten

thx martin

June 19, 2012
10:28 am
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coelacanth
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API kits came out best in some comparitive tests of hobbyist kits conducted by a zoo lab, using lab quality reagents as the standard, but all kits will age so it depends how old the kit is. Best thing to do is test your water then take a sample down to your usual aquatic shop and ask them to do tests, and compare the results.

On a large aquarium, I'd never just have the one filter, always better to have a back-up, but no need to go to the expense of another Eheim, IMO the newer Fluvals are just as good and the similar Rena models will also do perfectly well, you should be able to pick one up for about the cost of just the media in an Eheim. You could even just have an internal (pump- or air-driven) or HOB type, but a smaller external canister would be my preference.

It's unusual for a filter to crash unless there's been medication in use, over-zealous cleaning or something evil through the water supply at the time of a water change (but then the fish normally die pretty quickly anyway making the filter irrelevant!). Worth getting in some filter maturation fluid anyway, the API one is long-life and doesn't need keeping in the fridge.

Fish like Geophagus feed for extended periods of time, their guts are not really designed for single meals, always better if possible to break it down into smaller portions without increasing the overall amount, this will lead to more efficient digestion (and is easier for the filtration to manage).

If the other fish are looking fine in spite of the ammonia levels, it may be that this was just a weak fish or a one-off, but you should try to find out the reasons for that ammonia reading ASAP and take action to deal with it. 

June 19, 2012
3:44 pm
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Plaamoo
Bellingham, Washington U.S.A.
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Hey Jazz, I remember you having an ammonia reading in a previous thread and I don't think we ever got to the bottom of it?

http://www.seriouslyfish.com/f.....ds/page-3/

Have you tested your tap water for ammonia? If not, do so.

June 19, 2012
6:19 pm
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JazzBora150
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@ coelacanth    thx for your input i will look into the addition of another filter

no meds in tank at all

 

@ plaamoo   thx for reminding me about my earlier thread and your right i did have ammonia then too

tested tap water and is debatable to say its ok

the api kit i use says 0 ammonia is yellow (golden yellow)

my result shows a greenish yellow which according to api kit suggest that i have an ammonia

reading of 0.25 from the tap NOT GOOD

i am however warming up the gti for a race to lfs for a sample check

 

results later

 

heres hoping

martin

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