Hello, I am going to beg for help here, I just seem to have the worst luck with raising an aquarium so I look to you guys for help. I just started my new aquarium (if you search for older posts from me, you'll understand the need). So I did a fish-less cycle with fish-food. Went very smooth, Ammonia spike, slight nitrite spike, followed by a nitrate spike.
I changed 50-60% of the water, had a reading of 0 on everything and started with 4 zebra danios. I kept them for 2 days with no problems what so ever. I knew my goal was to eventually get an oscar, so happy with my results, I picked up an Oscar from the fish store. Tiny, cute little guy, no more than an inch big if that.
First day I noticed nothing wrong at all, come the second day, I notice the 4 danios only swim at the top of the tank when the light is off, and the Oscar frequents the Top but still moves around. As I turn the light on they freak-out for a bit then swim around the entire tank, not staying in any one particular area.
This goes on for a few days, today is day 6. I've been testing the water everyday, feeding the fish with flakes for the danios and pellets for the oscar. My tests are still reporting 0 for ammonia, nitrite, and nitrates. But today upon further investigation (or staring at my fish tank), I noticed a small film-ish looking covering to part of Oscar's(yes I named my Oscar Oscar) eye. I've been trying to find online what it can be, I've gotten results that it is a fungus, a parasite, poor nutrition, high ammonia, ect.... I can't distinguish between what it is and what is the proper cure.
Please help me, I am so proud of having great numbers, that I want to give this little guy the best envirornment to live.
Also just to include, this is a 55gallon tank.