Dead Zebra Danio

[cesar_oreo]

recently had a guppy die on me 4 days ago and now I had a zebra danio die on me. they both seemed to have died overnight. I have no idea what has been killing them. The only thkng I noticed on the fish was red spot on their belly and discoloration of the body and not the head.
water parameters:
78° F
Nitrate:10ppm
nitrite: 0ppm
hardness: 125 ppm
alkalinity:180ppm
ph: 7.5

 

[FishGuest5123]

Hi! What’s your ammonia reading? How often do you clean your tank? Do a big water change using dechlorinator right now.

 

[cesar_oreo]

Hi! What’s your ammonia reading? How often do you clean your tank? Do a big water change using dechlorinator right now.

oops sorry forgot the most important one
the ammonia is 0 ppm. so i doubt it is the ammonia.and i do water changes every saturday.

 

[Colin_T]

Hi and welcome to the forum

The fish has a bacterial infection (the red belly and cream patch on their body).

Get a broad spectrum fish medication that treats bacteria fungus and protozoan infections and treat the tank.
If you have catfish, eels, loaches in the tank, look for a medication that is safe for scaleless fish. If you can't find one for them, use a normal medication at half strength.

--------------------------
To work out the volume of water in the tank:
measure length x width x height in cm.
divide by 1000.
= volume in litres.

When you measure the height, measure from the top of the substrate to the top of the water level.

There is a calculator/ converter in the "How To Tips" at the top of this page that will let you convert litres to gallons if you need it.

Remove carbon from the filter before treating or it will adsorb the medication and stop it working.

Wipe the inside of the glass down with a clean fish sponge. Do a 75% water change and gravel clean the substrate. Make sure any new water is free of chlorine/ chloramine before it is added to the tank.

Clean the filter if it hasn't been done in the last 2 weeks. However, if the filter is less than 6 weeks old, do not clean it.

Increase surface turbulence/ aeration when using medications because they reduce the dissolved oxygen in the water.

 

[cesar_oreo]

Hi and welcome to the forum

The fish has a bacterial infection (the red belly and cream patch on their body).

Get a broad spectrum fish medication that treats bacteria fungus and protozoan infections and treat the tank.
If you have catfish, eels, loaches in the tank, look for a medication that is safe for scaleless fish. If you can't find one for them, use a normal medication at half strength.

--------------------------
To work out the volume of water in the tank:
measure length x width x height in cm.
divide by 1000.
= volume in litres.

When you measure the height, measure from the top of the substrate to the top of the water level.

There is a calculator/ converter in the "How To Tips" at the top of this page that will let you convert litres to gallons if you need it.

Remove carbon from the filter before treating or it will adsorb the medication and stop it working.

Wipe the inside of the glass down with a clean fish sponge. Do a 75% water change and gravel clean the substrate. Make sure any new water is free of chlorine/ chloramine before it is added to the tank.

Clean the filter if it hasn't been done in the last 2 weeks. However, if the filter is less than 6 weeks old, do not clean it.

Increase surface turbulence/ aeration when using medications because they reduce the dissolved oxygen in the water.

THANK YOU SO MUCH! Seriously can't thank ypu enough. Ive been trying to find out what the cause is and you definitely know what youre doing . Ill make sure to do all this today. thanks!