IntrepidUT99 Posted April 19 Share Posted April 19 (edited) Background: Tank is a 20 gallon long, that has been up and running for close to two years now. Stocked with: Hillstream loaches, medaka rice fish and 100s of shrimp and snails. Heavily planted. As of three weeks ago I added 4 new juvenile medaka rice fish to bring the count up to 10. The current medaka population is 2+ years old, so nearing old age. A week after adding new fish, I did lose a senior Medaka. Today I noticed another of the older fish showing signs something is off. I am convinced I have something in my tank, however only signs of distress are with the rice fish. Looking at the medaka rice fish in question , it appears parts of it are "washed out" or losing color and some fins are not in the best shape. Its also swimming slower than the others. Current water parameters: pH 7.4 Ammonia 0ppm Nitrite 0ppm Nitrate 25 ppm Phosphate 0.5ppm GH 9 (~160ppm) KH 4 (~70ppm) Water Temperature 71 F Picture of the fish in question is attached. Edited April 19 by IntrepidUT99 Link to comment Share on other sites More sharing options...
Colu Posted April 19 Share Posted April 19 Could be columnaris that's a gram negative bacterial infections that spreads more quickly at temperatures over 75 and can kill in 24hr to 7 days depending on the stain I would usually recommend treating with kanaplex and jungal fungus clear fizz tabs containing nitrofurazone following this treatment plan kanaplex and nitrofurazone can be harmful to shrimp so what I would do is two full course of maracyn2 active ingredient minocycline back to back @IntrepidUT99 Link to comment Share on other sites More sharing options...
IntrepidUT99 Posted April 20 Author Share Posted April 20 @Colu Thanks for the feedback and breakdown for a possible treatment! I unfortunately do not have maracyn2 on hand, would have to order. Would you happen to know if API Erythromycin can be used in its place? Link to comment Share on other sites More sharing options...
IntrepidUT99 Posted April 20 Author Share Posted April 20 @Colu Thanks for the feedback and breakdown for a possible treatment! I unfortunately do not have maracyn2 on hand, would have to order. Would you happen to know if API Erythromycin can be used in its place? Link to comment Share on other sites More sharing options...
Colu Posted April 20 Share Posted April 20 Erythromycin isn't my preferred choice to treat columnaris as you have it to hand I would start treating straight away maracyn2 active ingredient minocycline or API fin and body active ingredient Doxycycline is what I would use both won't harm your shrimp @IntrepidUT99 Link to comment Share on other sites More sharing options...
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