My fish issues as of late do not signal, to me, a water quality issue, but rather an infectious process of two types. A parasitic infection alongside some internal bacterial infections. I apologize for not having pictures of everything. I will describe the signs and symptoms. I will start with the parasitic infestation.
It began with one electric blue ram (EBR) and has since spread to primarily my cardinal tetras. It does not seem to have infected the other rams, however more sites have appeared on the originally infected fish. It appears to be a small white worm like parasite in the outer layer of tissue. It affects primarily areas near and on the fins of the cardinal tetras. It is located along the lateral line of the EBR and between the pectoral fin and gill. There are no behavior changes observed with this infestation. I have also seen it infect the eyes on the cardinal tetras, causing the ocular space to swell with fluid. My combat measures thus far have included manual removal with small forceps for examination, quarantine, and treatment with malachite green. Probably not the best choice however I did not have anything else available at the time. I do have a picture of this one:
The worm like parasite is smaller on the cardinals and not attached as much to the body as it is the fins.
Here is the description of the suspected bacterial infection. Over the last 2 weeks I have begun to notice a change in 2 fish, one a porkchop rasbora the other a cardinal tetra. There has been discoloration along the lateral line primarily in the belly area of the rasbora and the caudal end of the tetra. The discoloration appears to be suggestive of internal hemorrhaging. Yesterday it seems the discoloration has opened into a sore on the rasbora, which is quite large for the size of the fish. Interestingly the fish is swimming normally and not hiding or breathing in distress. It has eaten normally, however is not schooling as well. No behavior changes in the tetra. My initial reaction is to euthanize the infected fish and observe the others. However just today I noticed discoloration, or rather, a loss of coloration in spots on the EBR's. I do not know if this is due to initial parasitic infection or underlying bacterial. I know i have both problems. I can try to get pictures of these, however I do not know if the quality will be good enough to aid in diagnosis.
I have erythromycin and AP's general parasite cure ready to go. Can I dose both of these meds at the same time? I believe they will be safe for my shrimp, but if not let me know and I will setup a hospital tank. Instead of saving the severely infected fish I believe it best to euthanize them to stop their contamination of water and other fish. I also have packets of flubendazole, which I have used in the past against some hydra in a shrimp tank. This was effective and safe for the shrimp in the low dosages I used.
Help is GREATLY appreciated. If you need more info or further details please let me know and I will provide whatever I can. Thank you!