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Discussion Starter · #1 ·
i woke up today and all my fish were dead i dont no what happened maby i had an ammonia spike my parameters areno2 and no3 are zero ph is 7.0 kh is 40 gh 180 someone help please i just put in a new filter could it be the flow or the filter in some way someone help so i can fix it please and the two mollies are swimming on the bottom
 

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Discussion Starter · #4 ·
i had 10 fish now i have 5 and one is on the top kinda gulping for air its a brand new filter i just put it in the other day it a 7.9 gal and the water is kinda cloudy
 

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Maybe an airborne chemical like a air freshener, cleaning product or something else used in the home? I wouldn't necessarily have to have been used in the same room if it was potent enough.
 

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You said NO2 (nitrIte) and NO3 (nitrAte) are zero - Is that correct? Did you test for ammonia?
 

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Change 50% of the water and see if the condition of your fish improves. If so I would continue changing about 30% of the water every 3 days or so for the time being. Make sure to treat the new water for chlorine/chloramine with a good water conditioner. Also make sure the new water is approximately the same temp as the water in the tank.

Unless your water is way too hot I am guessing your problem has to do with water quality. When you switched filters you probably removed a lot of the good bacteria that converts Ammonia to Nitrite to Nitrate. It may take a couple of weeks until a new colony is established.

How long as the tank been set up? Was it cycled? Do you have live plants and if so, how many? You had 10 fish in an 8 gallon tank? That may have been your initial problem depending on how large the fish are/were and your water change schedule.



You said NO2 (nitrIte) and NO3 (nitrAte) are zero - Is that correct? Did you test for ammonia?
 

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i had 10 fish now i have 5 and one is on the top kinda gulping for air its a brand new filter i just put it in the other day it a 7.9 gal and the water is kinda cloudy
Sounds like a bacterial bloom to me. It was likely a combination of your new filter and the possibility you did not cycle your aquarium in the first place (nitrates should not be zero in a cycled aquarium).
 

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re

I'm no big expert but what you described is sounds like Amonia spike.

In such a small tank... it's impossible to save your fish, besides did you say you changed your filter? that could be the cause, as you probably lost 2 3rds of your beneficial bacteria .
 

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Discussion Starter · #10 ·
i just did a water change. its been set up for like 2 and a half years now and i have many plants including anubias and some swords and some java fern and a piece of mopani wood the tank i well established and this is the second major die off ive had the first was when i went away so i dident no what went wrong but today i got up and the water was kinda cloudy and all the fish were dead i think it was and is a ammonia spike from the new filter cause thats the only thing i changed in the last 6 months i did the water change and now everything seems fine ill have to monitor it for awhile and do more water water changes
 

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did you use filter media from your old filter or run them side by side before removing the old filter? May be ammonia if thats the case since you dont have a colony of bacteria built up in your new filter.
 

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Is this the same tank your cories were dieing in?

Did you get the liquid tests? Or you still using the strips?
 

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Discussion Starter · #15 ·
i got some ammo liquid but i still haven't had any money to buy a good test kit yet also i bought some ammo solution and put it in my tank so far it looks very bleak in there i hope everything lives and the ammo test i did read .2 on the color meter and it was a vary light green
 

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Water change water change water change. That is your best bet right now rather than adding more chemicals to the water.

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