Losing tetras

Another today, I have 2 black skirt tetras that seem to be not affected. I also have red phantom tetras that are okay, as well as my other fish, I had 6 black phantoms I now have 2 left I'm just going to let it ride out, as there is no use treating if I don't know what's causing it. As all water tests are good.
 
I'm probably grasping at straws, when I look at the tank I think are they getting enough oxygen, but it looks as if they are, but I've put in a fortnight ago 6 panda corys, and noticed the 6 stay together and swim half way up the tank, but not reaching the surface, I've never had them, so I don't know if this is usual behaviour, my 200 litre tank has a Fluval 307 filter and a fluval mini filter running, would I be better changing the 307 for a Fluval 407?
 
I just noticed a build-up of oily film on the surface of the water in those pictures. That can impact gas exchange. I had it on one of my old tanks a few years back and it did affect the ember tetras I had at the time (constant gasping, lack of movement, etc). A simple airstone/sponge filter will fix it. A temporary fix is using some kitchen roll and placing it on the surface which soaks it up.

I use a very small air pump sold on Amazon for my current tanks. I currently have 2 running and they are great for a single sponge filter/airstone.
 
Thanks my tanks are in a bedroom where I sleep I've tried a couple of different air pumps and the noise would send me bananas, i tried everything wrapping in towels, hanging them from a hook,, sitting them on sponges, nothing worked.
 
Thanks my tanks are in a bedroom where I sleep I've tried a couple of different air pumps and the noise would send me bananas, i tried everything wrapping in towels, hanging them from a hook,, sitting them on sponges, nothing worked.
I have two tanks running air-driven filters in my bedroom as well. I have the pump plugged into a smart plug so I can alter the times it turns on and off. I have them turn off at 23:50 and then turn on at 4:30 am for half an hour to make sure the tank has enough oxygen and then back on at 10:30 am. If you arent 100% sure on smart plugs I would suggest something like this.
1741016428505.png

You would have your other filters running throughout the day and the air driven one on for 10 hours a day for example. Just make sure you have a non return valve fitted to the air hose just to be sure.
 
Thanks my tanks are in a bedroom where I sleep I've tried a couple of different air pumps and the noise would send me bananas, i tried everything wrapping in towels, hanging them from a hook,, sitting them on sponges, nothing worked.

Me too, the sound of the motors of air pumps drives me nuts. The bubbles themselves are not a problem (for me), I even find that it's a relaxing white noise.

In my living room, I suspended the pumps in socks in the back of a wardrobe, and ran the air lines to the tanks from there. The clothes hanging in the wardrobe completely mitigates the sound. And it's perfect.
 
This is happening today it was fine this morning, this leaves me one phantom left, out of 6 did a water test, ammonia, nitrite, nitrate, and all good ph 7.5, I've dosed tank again with interpet anti bacteria it gets another dose in 4 days,, I just wonder if I'm going to lose all fish in this tank, I will just have to wait and see, will let this be the last post on this subject, hopefully things may settle down, but who knows.
20250305_145102.jpg
 

Most reactions

Back
Top