First things first:
Tank size: 5 gallons
Filtration: one HOB filter with bio medium and filter wools, one sponge filter.
Water specs: Ammonia: 0 Nitrite: 0
Nitrate: between 5-10 ppm water hardness: 100+ PH: 7.6 - 7.8
Aquarium type: freshwater
Livestock: one nerite snail, 5-10 pest snails, one...
My six years old goldfish, a beautiful fantail, has been having tubercles on his gills (spawning, i have been told) and now he has long red streaks on his tail fins. I do 25% water change of my 30 gallons every three-four days and always Use Seachem Prime with water changes. He...