Ok, I'll try to take video.
[*]Nitrite Level? 0
[*]Nitrate level? 25
[*]Ph Level, Tank (If possible, KH, GH and chloramines)? 8.0 ( always bit higher)
[*]Ph Level, Tap (If possible, KH, GH and chloramines)?7.0
[*]Brand of test-kit used and whether strips or drops?tetra drops
[*]Tank size (how many gals.) and how long has it been running?215l running 1,5 years
[*]What is the name and size of the filter(s)?juwel inner filter 1000 l/h
[*]How often do you change the water and how much?once a week, 30-35 %
[*]How many fish in the tank and their size?5 goldfishes, about 7-10 cm in body
[*]What kind of water additives or conditioners?no conditioners, I used it but quit.
[*]What do you feed your fish and how often? Twice a day, usually nutrafin pellets, often homemade food and sometimes tetra delice and some jbl's foods.
[*]Any new fish added to the tank?No
[*]Any medications added to the tank?No
[*]Any unusual findings on the fish such as "grains of salt," bloody streaks, frayed fins or fungus?No
[*]Any unusual behavior like staying at the bottom, not eating, etc.?Black moor sometimes sitts on the bottom of tank, but last days he was very active.