I made an absurdly stupid mistake of cleaning both my filters at the same time and pretty much crashed the ammonia-nitrite-nitrate cycle in my tank. I realized this when I noticed that my Oto's gills were bright red, like they were bleeding. Ammonia test was 0.25-0.50ppm, so I immediately changed 50% of the water. So basically, my tank is now going through a fishy cycle except, oh yeah, my tank is fully stocked! I do have plants which I suppose should alleviate the situation somewhat, but I'm still not really sure what to do. Any help would be greatly appreciated.