Everything was going swimmingly (excuse the pun), then something seems to have upset the balance.
Iíve not changed anything, the fish stock has remained the same for a long time now, not introduced any new plants, not done filter maintenance.
Ok, I admit that my weekly water changes did slip for 2 weeks as I had a lot on my plate.
The other day I noticed one of my prized Rainbow fish that I've had for years and years (3.5 to 4 inches long) had a few Ďsuspiciousí looking scales at the base of the tail fin. I kept an eye, and over the course of a few days it started to look a bit sore. I also caught one of my Odessy Barbs trying to pick at it. I also noticed that the lips on one of my Parkinsons Rainbow Fish looked a little white Ė maybe fungal.
So, off down the LFS I went, and bought some Ďanti fungal and fin rotí treatment. Did a 25% water change and dosed the tank up.
This morning I found my rainbow at the bottom of the tank, so took it out (hereís the pic)
Quickly tested the water Ė everything was good APART from the Nitrate, which was (from memory) 40ppm
I have now proceeded to do a 50% water change again, and will do another 50% over the weekend at some point. The water that I replaced I dosed some more treatment, and also added a tiny bit a salt
My plants arenít looking in the best of nick either, but I know that itís about time for some more root tabs, and my jungle vals have gone mad so need cutting back to allow for more light to get through Ė so thatís not that much of an issue.
Iím thinking that somewhere, behind some plants, rock, wood, there is a dead-patch, where all the fish waste may be building up (somewhere where I canít get to when I to a vacuum), which may be causing some levels to rise, even though my ammonia were fine in the water tests.
Any ideas, or suggestions? Or could it just be; rainbow big = rainbow old = rainbow more prone to catching something = rainbow caught something = rainbow died.
Oh, I think the lips on the Parkinsons Rainbow have cleared Ė well, I couldnít find it anyway, unless thatís died and is behind something.