


About the tank:
It is a 65 gallon community tank with 6 silver dollars, 1 Corey cat, 1 alge eater, 4 zebra danios, 2 tiger bards, 2 austrailan rainbow fish. The water parameters are: pH: 7.6, Amonia: 0, Nitrogen, 0, Nitrates: 5 ppm. Water changes are done on a regular schedule at 50%. The fish are fed on a regular schedule (2X day in the AM and PM). The tank does not receive any direct sunlight and is kept normally at a steady temp of 77 degres. Being a community tank the aggression is minimal to none. The tank is well filtered with a Penguin 350 and two sponge filters.
I know that Silver Dollar fish are prone to ich infections but this just might be something else. I noticed this one spot last night after feeding the fish. I took a few picture (I will attach). After I noticed the spot I upped the tank temp to 82 degrees F. Tonight when I get back home I will up it again to 86 degrees F. Just in case it is ich I will begin adding salt to the tank (2 teaspoons per gallon?). The tank is already well oxygenated and filtered so I won’t have to make any adjustments there. Now that I think about it I believe I will do another 50% water change (cleaning some of the substrate also) before adding the salt and upping the temp. After the water change I will add the salt and up the temperature.
Okay, any other suggestions of what this might be if it is not ich? Any other suggestions of anything else I can do such as garlic? Anything would be appreciated?
Also, know that I have been caught without a hospital tank since my tank is currently being rebuilt due to a leak (caused by age).
About the pictures: The spot that I am referring to is just below the dorsal fin. The other spots in the water are just food debrie that was stored up during feeding. These spots were not visible with the naked eye when I took the picture. Again I was not able to see white spots on any of the other fish in the tank and the fish are all behaving normal. What do you guys think?