Hi everyone! In all my years of keeping goldfish, I have been fortunate enough to never have to deal with fish lice... until now! I added a new shubunkin to my tank close to a month ago, and I found a fish louse yesteday after treating twice with melafix for what I thought may have been fungus. The new shubunkin also has an ulcer on his side, with a few scales lifted. He is not flashing and both shubunkins are active and eating well. There are 2 mystery snails in my tank as well.
I went back to the fish shop I purchased my male shubunkin at, confronted the manager and showed him the lice, and he directed me to medication. I convinced him to give me medication for free since his fish came with lice (he later admitted that they treated the tank of shubunkins for fish lice last week). I left with some fluke tabs in a bag with no directions (although I found them online) but my concern now is: should I treat the tank (yet) even though I cannot see anymore lice and the new fish was added a month ago? My tank is very well established and since I am overstocked, I worry about upsetting my biological filter. My other worry is that my new guy has what looks like a cyst or ulcer under the skin, which seems to be manifesting as a few raised scales with a little redness starting at the tips of a few scales (it looks that way, anyways). The lifted spot is rather small still and doesn't seem to be causing him any trouble. Also, if I go ahead and treat with the fluke tabs, I am thinking I will need to remove my snails and put them elsewhere until treatment is done. Is this correct for those of you who have used fluke tabs before or know about them?
What does everyone think?
Ammonia Level: 0ppm
Nitrite Level: do not test
Nitrate level: do not test
Ph Level: 7.9, Nutrafin drop test kit
Water temperature: room temperature rannging from 17-21 degrees celsius.
Tank size: 20 gallon, fully cycled, running for approximately 10 months (9 months with a healthy female shubunkin and 2 mystery snails, no health issues).
Aquaclear 30 filter with only sponges, bubble wand.
Water changes weekly, 20-25%.
how many days ago was the last water change and how much: 25% water change on April 5th after 2nd melafix treatment.
How many fish in the tank and their size: 2 shubunkins: approximately 2 and 3 inches.
What kind of water additives or conditioners: Nutrafin aqua+plus
What do you feed your fish and how often: 2-3 small meals of flakes daily, peas once in a while.
Any new fish added to the tank? Male shubunkin added nearly a month ago, brought home fish lice from fish store! 2 mystery snails added nearly a month ago.
Any medications added to the tank? 2 treatments with melafix, 25% water change on April 5th, no medications added since.
Any unusual findings on the fish such as "grains of salt," bloody streaks, frayed fins or fungus? One fish louse seen switching back and forth between fish, eventually I found it swimming in tank and caught it. No more fish lice seen in tank at this time. Male shubunkin (the new fish) has an ulcer on side, with a few raised scales. No flashing, no clamped fins. Both are eating well and swimming well.