I have 6 cories. A few days ago I saw that one of the cories barbells are completely worn away. He was still swimming around and eating. Now, he just lays at the bottom and I canít tell if he is eating or not. Iím not sure how he lost his barbells. Iím not sure what to do about it.
I have a sand bottom, 20 gallon mostly planted tank. I vacuum the sand for detritus once a week and change about 20% of the water every week. I test 2x a week for ammonia and nitrate. Ammonia is 0.0 & nitrates are 20 ppm
. The tank is running around 11 months and I have had these cories about 6 months. I also have 5 neon tetras. I have fluval 307 canister filter.
Any suggestions are greatly appreciated!