I have a few tanks and one of them, a 29G which has been cycled since March is having some problems.
Most notably my cories (6 that I've had since April) and my rams (3 since June 1) are all a bit lethargic and showing a variety of subtle symptoms.
Cories - The iridescence around the gills has grown more prominent and I think I can see some whitish crystals. These have formed slowly since May so I highly doubt that it's ich. 2 of the 6 have lost barbels and they all have white streaks around their bottom fins. One or two of them flash once in a while (once every 8-10 hours of watching the tank) and when at rest their fins are more limp than normal.
Bolivian Rams - Appetite has decreased over past month. Gills look a little red to me and their breathing is a little labored. One of them is flashing more than the other fish and they seem to really pinpoint their gill areas when scratching. I see him flashing every few hours.
Other livestock doing fine: Rasboras, BN Pleco, Amano Shrimp, otos (sort of, long story)
In April I did bring in 2 Bolivian Rams that turned out to be pretty sick but I never figured out what it was. They both had a traumatic car ride and showed that their ability to manage a low oxygen situation was much worse than a healthy fish. They were both gills up after a 20 minute car ride. One died a couple days later and the other lasted 2 weeks before dying. They never showed any obvious symptoms other than lethargy and lack of appetite and they became rather thin.
The tank is very stable. I test the water frequently with API liquid test kit. Ammonia and nitrites are zero and nitrate rarely reaches above 10. That being said 2 weeks ago the tank did reach 30 in nitrates after I had removed a bunch of plants battling an algae problem, but I don't think that's a root cause of anything, but it may have increased the intensity of any possible sickness that has been lingering.
I have some pictures and videos and am curious with anyone's opinion.
I'm treating this like I'm quarantining a set of fish from a store that I don't trust and I'm suspecting gill and or skin flukes.
- Currently treating with PraziPro (flukes, worms). Will follow 5 day treatment. Do a water change, wait 3 days, and then do another treatment and then a water change after the 5 days.
- After PraziPro I'm going to treat with a combo of melafix and pimafix for any subtle fungus and to help heal any damage from any possible parasites.
Hopefully this will clear my tank of anything and rule out a lot of low hanging fruit.
Any input others may have will be appreciated so that I can snuff out whatever is going on before I lose any fish.