Tropical Fish Keeping - Aquarium fish care and resources

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ralph 05-15-2008 06:45 AM

Hey Guys.

has anyone any idea why my tropical fish have all died like flies. One by one we have lost 2 Bala Sharks, 2 Gourami , 1 Large angel fish, sucker fish, Cookoo cats. One by one each 3 to 4 days they have died. We have checked the water all PH is fine 7.2 all nitrate low and Nitrite low well filtered and air rated have never had any probs before would appreciate some sort of explanation if you guys could help. I know it's too late for the fish, but would like some closure as a lot of money has been flushed away and we don't want this to happen again. Thanks hope to hear from someone soon. :cry:

okiemavis 05-15-2008 06:47 AM

In order to help we're going to need some more information, including specific numbers on your nitrites (which should be zero). Could you read this link and give us the information it asks for?

Lupin 05-15-2008 06:51 AM

What is your ammonia and how low are your nitrates and nitrites?

ralph 05-15-2008 07:02 AM

Thank you, sorry.

32 gallon
2 years
fish are as mentioned (deceased)
Yes we have two live plants
78 f
yes co2 unit used
no sunlight
water change done approx 1 week ago 1/3 changed
water change ever 3-4 weeks
feed every night Omega one flakes
flouro lights on at least 6 - 8 hours
all fish dead one trying to survive not sure what to do with it.
Ph 7.2
Nitrite Nil
Nitrate Nil
do not have ammonia test
liquid test Nutra fin
3 weeks ago, seemed fine Have brought all fish from same shop.

thank you.

Lupin 05-15-2008 07:13 AM

Okay, I see a few issues here.

1. Water changes-Considering your tank has that many fish and feeding is done on a nightly basis, water changes should have been done at least twice a week at 40-50%. 3-4 weeks is actually too drastic for that. There is no telling what your ammonia is without a kit for one. Who knows whether it is zero or not. I would consider switching the kits to API. API is reliable and accurate.

2. Test kit-I have not used Nutrafin liquid kit however I find it unusual how your nitrates are actually zero despite your water changes and feeding schedule. It would take a very heavily planted tank to achieve that zero nitrates.

okiemavis 05-15-2008 04:16 PM

Zero nitrates would indicate an uncycled tank, which yours doesn't sound like it is since it's been up for two years. Those nitrate bottles need to be shaken like crazy or you won't get a reading. Why don't you test again but shake them a lot this time? If you still aren't getting a reading, it's probably a problem of an inaccurate test kit. Most of us around here use the API Liquid Master Test Kit, which tests for all the important stuff, including ammonia.

What sort of filter do you have? Regardless of how good your filtration is, that's a lot of fish to add at one time. Your tank probably had an ammonia spike which killed them.

One other thought, there may be something in your tank that is killing them, such as a chemical or a disease. How long ago did you last have fish in your tank? What was the stocking and do you know why they died?

willow 05-15-2008 04:24 PM

have you done anything different to the aquarium at all,
even the smallest detail ?
have you had any thing done DIY in the house near the aquarium.
have you had a power cut at all ?
have you changed or done anything anything in the filter.
new spray used,fly killer ?
just a few things off my head.

Busgod 05-15-2008 09:12 PM

heres one alot dont think of some time on older tanks your system works too well and you get a die of of bactira and spike ammonia ( happened to me i changed too much water to fast killed evertthing in tank including fish)

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