I really would not add any ammonia to this tank, not with bacteria seeded from elsewhere. There is a real risk of killing the bacteria with ammonia.
We had a thread a couple of weeks back in which several of us were discussing bacteria, and how difficult it is to kill them off by not having ammonia (food), as in a tank where there are no fish. It is a myth that the bacteria will die off, they just will not. They go into a sort of hibernation or suspended state, so to speak.
Ammonia is a deadly toxin to all forms of life, which is why it is used in cleaning products. While in a new tank adding pure ammonia will obviously speed up the establishment of nitrifying bacteria, once the bacteria are present you can easily kill the lot with too much ammonia. The second point is that the second stage bacteria, the Nitrospira species that use the nitrite, can be inhibited and even killed by too much ammonia.
We can assume there is an establishment of nitrifying bacteria from the seeding. I would now begin to add fish, just a few (one species together, never break up species groups). Adding the fish food as Akasha mentioned is fine, that will work as it is much the same as the fish, though taking much longer.
Re the eyes, I agree with Akasha that this is not something you can cure. It is probably cataracts. I spotted one yey like this on one of my Diamond Tetra the other day. It is not contagious, and just leave things. I had a Congo Tetra many years ago that became blind in both eyes, and he lived for many months afterwards. It was interesting feeding him, as of course he detected the food by smell alone.
Byron.
We had a thread a couple of weeks back in which several of us were discussing bacteria, and how difficult it is to kill them off by not having ammonia (food), as in a tank where there are no fish. It is a myth that the bacteria will die off, they just will not. They go into a sort of hibernation or suspended state, so to speak.
Ammonia is a deadly toxin to all forms of life, which is why it is used in cleaning products. While in a new tank adding pure ammonia will obviously speed up the establishment of nitrifying bacteria, once the bacteria are present you can easily kill the lot with too much ammonia. The second point is that the second stage bacteria, the Nitrospira species that use the nitrite, can be inhibited and even killed by too much ammonia.
We can assume there is an establishment of nitrifying bacteria from the seeding. I would now begin to add fish, just a few (one species together, never break up species groups). Adding the fish food as Akasha mentioned is fine, that will work as it is much the same as the fish, though taking much longer.
Re the eyes, I agree with Akasha that this is not something you can cure. It is probably cataracts. I spotted one yey like this on one of my Diamond Tetra the other day. It is not contagious, and just leave things. I had a Congo Tetra many years ago that became blind in both eyes, and he lived for many months afterwards. It was interesting feeding him, as of course he detected the food by smell alone.
Byron.