geneticmaize
Aquarium Advice Newbie
We have a Danio that is smaller than our other Danios that has been swimming strangely for 2 days, trembling and mostly staying in one spot. This morning I noticed what seems to be internal bleeding on one side, toward the tail. It rapidly got worse this morning, so I just euthanized it with ice. RIP little Danio.
So my question is - is this contagious vs some sort of genetic deformity or maybe one of the other fish hurt it? If contagious, what can I do to treat the other fish? I was thinking to replace about 20% of the water tonight.
Background - we have 4 Danio in a new 20 gallon tank (also a gold mystery snail and some moss balls). They seemed to be getting along fine, and the others are all swimming around and eating as expected. I am totally new to this, so I may have gotten the fish too soon. The tank has been set up for about a week, but I had added bottled bacteria along with the water conditioner. It was set up for 2 days, then we got 2 fish, then two days, then 2 more fish. There's a regular filter, and I added a sponge filter with airstone last night.
My pH is about 7.4, ammonia is about 0.25, nitrite is 0, nitrate between 0 and 5. I'm going to PetSmart later to have them test the water, too.
So my question is - is this contagious vs some sort of genetic deformity or maybe one of the other fish hurt it? If contagious, what can I do to treat the other fish? I was thinking to replace about 20% of the water tonight.
Background - we have 4 Danio in a new 20 gallon tank (also a gold mystery snail and some moss balls). They seemed to be getting along fine, and the others are all swimming around and eating as expected. I am totally new to this, so I may have gotten the fish too soon. The tank has been set up for about a week, but I had added bottled bacteria along with the water conditioner. It was set up for 2 days, then we got 2 fish, then two days, then 2 more fish. There's a regular filter, and I added a sponge filter with airstone last night.
My pH is about 7.4, ammonia is about 0.25, nitrite is 0, nitrate between 0 and 5. I'm going to PetSmart later to have them test the water, too.