I feel like I've been LIVING on this board for weeks. It's one thing after another. I've fought columnaris for months, and my big 55 gallon tank has not been broken down due to so many fish still in it. It seems I get an outbreak of it every few months.
Well, now.. I have a Turquoise Rainbow that is in my 20 gallon high with male guppies for the last two months. I had plans to put him into the 55 gallon tank when I get more Rainbowfish, because there's only a female bow in there now, and he chases her without stopping. So I know the 20 gallon is too small for him, but I was planning on releasing him into the 55 within a few days, after I get the new fish. I have been very anxiously waiting to do this, and now... another problem.
Well, today I noticed he has a small white cyst-looking bump on his mouth. It's not fuzzy--just cyst-looking. It's on his bottom lip. He's been fine up until now, and still is acting fine. I had a guppy die this morning from that same tank, but no symptoms of something bad at all. No film, lumps or anything. He got the shimmies and died two days later despite putting him in a quarantine tank with salt. So I'm hoping he didn't have columnaris. This 20 gallon he's in has never had a case of columnaris, and fish were quarantined before they went in there.
What is likely wrong with my rainbow? Ammonia 0, Nitrites 0 Nitrates 10. 30% water changes weekly. Ph 7.6. Should he be treated in quarantine? Or should I wait to see if he gets sick? I don't want to medicate when I'm not sure what is wrong with him.