Alright so my aquarium keeps having ammonia spikes. I don't know why. Can a cycled tank just stop being cycled? I haven't really seen any significant levels of nitrates anymore which makes no sense. I only see the ammonia for the most part. I had to do a significant water change last night to get rid of the ammonia. Ive had my tank set up for idk 3 months now. My most recent water test was .25 ammonia 0 nitrite and 0 nitrate. That was after my last water change. I didnt do a test before hand but my fish were all hanging out near the top taking breaths at the surface so I immediately did a water change. Should I just add more good bacteria? I always feed near the same amounts.