Backyard Aquaponics
A place to discuss aquaponics

so i just made a new system ibc tank
the silver perch i got were all eating for about 2 weeks in a glass tank for temp
but when i moved them to the new tank there not eating at all some do some don't

how every i lost 2 so fair from 25

the water is from the water tanks

how ever i noted there body is in i can't really say but it also have a red dot

i'm not sure if it could be because it's cold outside or something else

i have attached a photo of one that is dying slowly

i put hin in tap water and seem to be moving around still and looks like it should make it
but not sure only time can tell

It's always tough to say with fish problems like this. The injury could be from a small predator like a dragonfly larvae which has a piercing weapon - https://www.youtube.com/watch?v=RD5wsoycsqI. The one in the video is actually a damsel fly larvae not a dragon fly larvae but they hunt in similar fashion and you get the idea I think. I have lots of these in my grow beds but not in the tank (probably because larger fish eat them)

It could also just be the site of an infection

The fish looks like it was not eating as you mentioned. If you haven't salted the water in your fish tank I would do this to 1ppt - 1KG per 1000L or 1gm per L (un-iodized and no caking agents). If you have strawberry plants, they are about the only plant that should be affected. The salt helps the fish with nitrite toxicity and with stress.

You may want to take a magnifying glass and see if you see any indication of parasites as well.

edit: Here's a better video showing a dragon fly larvae and how it works - https://www.youtube.com/watch?v=W557aSVdW_g

Hi scotty

thank you i found the problem my fish were stressed to max will i took them out and put them back in the other tank and i found the water was poor also so i replaced the water and just going to restart

i forgot about salt i got some last night and there started eating today which seem great well ONE problem haha my fault i forgot to put the cover on the fish tank found about 10 on the Floor. my problem something must of scared them has happen before in the years

it's bugger have 15 left now but no problem i buy some more

so have to wait 3 week for the fish tank to restart again