Lost the whole crew last night - The Planted Tank Forum
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post #1 of 7 (permalink) Old 09-10-2016, 01:53 PM Thread Starter
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Lost the whole crew last night

Hi everyone, long time aqua-nut first time poster here.
Yesterday I finally added fish to my aquarium to cycle it. They all died by morning, and I've never had this before.

5x black terraces
1x Anubias plant (not sure which)

My Setup:

30 gal, eco complete substrate, sunsun 304b filter, 24/7 finnex led light, heater, air stone, powerhead.

I also have a pressurized co2 setup but its not active.

I have DIY a foam/quickcrete background.


Measured water parameters this morning;

Nitrate 10ish ppm
Nitrite 0-.5ppm
PH 7.5-8
KH. 120ish
General hardness 180
Bromine 0
Chlorine 0

The waters been circulating for a day or so with "prime" added, and the parameters, minus general harness, seem to be ok.

What happened... can anyone help, or give advice?

Planning to do large 30-40% water change and add goldfish to cycle it. Good/bad idea?
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post #2 of 7 (permalink) Old 09-10-2016, 01:57 PM
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You do not mention ammonia reading? So with that thought and since ammonia is the first step before getting nitrite and then nitrate, I would assume there is a high level of ammonia which will kill quickly.
So before doing the same, look up and understand what the cycle is about and then do a fishless cycle to save damage to any fish.
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post #3 of 7 (permalink) Old 09-10-2016, 01:59 PM
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Fish dies due to Ammonia burn while cycling and you skipped that test.

Please don't put fish for cycling. Please read the below sticky and choose wisely.

https://www.plantedtank.net/forums/8-...ml#post1960797
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post #4 of 7 (permalink) Old 09-10-2016, 02:14 PM Thread Starter
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Well after reading that I feel bad. I've always just let the tank swirl for a day and then added fish. Can't say I've ever had an issue but I'm not the fish!

I'll pick up some ammonia and try out the fishless cycle.

Bummer. My girlfriends children will soon be asking where all the fish went.

Thanks guys!
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post #5 of 7 (permalink) Old 09-10-2016, 02:21 PM
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Quote:
Originally Posted by Anchor View Post
Well after reading that I feel bad. I've always just let the tank swirl for a day and then added fish. Can't say I've ever had an issue but I'm not the fish!

I'll pick up some ammonia and try out the fishless cycle.

Bummer. My girlfriends children will soon be asking where all the fish went.

Thanks guys!
If you are into plants, buy lot of plants and start it will speed up the process.

Good luck, patience is the key here.
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post #6 of 7 (permalink) Old 09-10-2016, 02:58 PM
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Where things may have worked before, there may be a major difference with the Eco complete.
If one adds a few fish into an uncycled tank, that one or two fish will only add a small amount of waste which turns to ammonia. But with the eco and a larger group, the ammonia is sure to have been much greater.
The difference is in the first case, they get some damage and they may appear to have not been harmed but like humans with damaged lungs, they tend to die sooner. Think of it as what smokers find? When they smoke a bit and then quit, they may never think of them as damaged but if they continue for years, they tend to die as their lungs become progressively worse.
More ammonia means more damage and more fish die sooner.
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post #7 of 7 (permalink) Old 09-11-2016, 06:28 AM
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The 7.5+ pH made the ammonia more toxic. Ammonia is a killer. Watch out for chlorine too. They're both bad if you don't test.
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