We recently got a 120gal tank for our 3 colombian sharks(to relocate them from a 55gal). They have been in there for the last two weeks and seemed to be doing well. They were swimming all over the tank and looking good. In the 55gal they would just swim up and down the side by the filter.
But yesterday afternoon one of them went missing. I looked around and found him under a piece of dirftwood dead. He looked good aside from the fact that he was dead. No signs of damage or sickness. Then this morning another one had died, he was between a piece of driftwood and a plant. Then this evening we saw the last one die.
While he was swimming he was only using his tail. He would flop around after he would push off and have no control where he would go. He would flip upside down, which he didn't seem to like, and would try to get himself back right side up. He would sometimes pause, then sink to the bottom, when he would hit the bottom he would start swimming again. We watched him for about 5 minutes before he went under a piece of driftwood and stopped moving.
If have not seen anything like this before, all the other fish in the tank seem to be fine. And when inspecting the sharks, they all looked fine. No signs of damage or disease.
When we tested the water our parameters were greate.
pH- 7.4
Ammonia- 0
Nitrite- 0
Nitrate- <5
Temp- 27C
His tankmates are a large pleco (from the 55gal), 4 violet blushing sharks(3-4in), 1 small clown loach(2.5in), 1 small oscar(2in).
Any thoughts on what this could be?
Could this be related to salinity? I am not sure what too little salinity would cause.
But yesterday afternoon one of them went missing. I looked around and found him under a piece of dirftwood dead. He looked good aside from the fact that he was dead. No signs of damage or sickness. Then this morning another one had died, he was between a piece of driftwood and a plant. Then this evening we saw the last one die.
While he was swimming he was only using his tail. He would flop around after he would push off and have no control where he would go. He would flip upside down, which he didn't seem to like, and would try to get himself back right side up. He would sometimes pause, then sink to the bottom, when he would hit the bottom he would start swimming again. We watched him for about 5 minutes before he went under a piece of driftwood and stopped moving.
If have not seen anything like this before, all the other fish in the tank seem to be fine. And when inspecting the sharks, they all looked fine. No signs of damage or disease.
When we tested the water our parameters were greate.
pH- 7.4
Ammonia- 0
Nitrite- 0
Nitrate- <5
Temp- 27C
His tankmates are a large pleco (from the 55gal), 4 violet blushing sharks(3-4in), 1 small clown loach(2.5in), 1 small oscar(2in).
Any thoughts on what this could be?
Could this be related to salinity? I am not sure what too little salinity would cause.
