I'll be the copy-and-paste elf:
1. What is the size of your tank?
180
2. What are your water parameters? State the brand of test kit used.
Perfect
3. Is your aquarium set up freshwater or brackish water?
Fresh
4. How long the aquarium has been set up?
2 years
5. What fish do you have? How many are in your tank? How big are they? How long have you had them?
1 X 12" Trimac, 4 X 4" Silver Dollars, 1 X 6" Rafael Cat, all since the tank was started. 1 X 4" Trimac (daughter of big one), 5 X 2" Cory Cats.
6. Were the fish placed under quarantine period (minus the first batch from the point wherein the tank is ready to accommodate the inhabitants)?
Yes, and all other fish appear healthy now.
7. What temperature is the tank water currently?
80 degrees.
8. Are there live plants in the aquarium?
No.
9. What filter are you using? State brand, maintenance routine and power capacity.
2 Rena XP3's, 1 Eheim 2213, 1 AC 110, 1 AC 70
10. Any other equipment used (aside from heater and filter which are two very important components of the tank)?
3 Hydor Heaters - to keep water warm during water changes.
11. Does your aquarium receive natural sunlight at any given part of the day? What is your lighting schedule (assuming you do not rely on sunlight for our viewing pleasure)?
No, located in a basement. Has brown algae.
12. When did you perform your last water change and how much water was changed? How often do you change your water? Do you vacuum the substrate?
1/2 water change once a week and always vacuum substrate
13. What foods do you provide your fish? What is the feeding schedule?
Feed twice a day, Hikari Bio Gold, Hikari Growth Pellets, Hikari Algae Wafers, NLS Sinking Pellets Large & Small, Omega One flakes & Pellets, Superworms, Earthworms, Crickets, Krill, Bloodworms. Never Live.
14. What unusual signs have you observed in your fish?
Lethargic, and blind in the worst eye.
15. Have you treated your fish ahead of diagnosis? If so, what treatments did you use? State your reasons for planning ahead of proper diagnosis.