A while ago, the two goldfish I posted about died from being sucked into the filter. I drained the aquarium and after a while I filled it back up and started cycling. Two weeks in, I went on a family trip and added extra ammonia so the bacteria wouldn't die. There was .25 ammonia left when I got back. I dosed it back up and for a week it's been at 4 PPM. I haven't added ammonia at all so what's going on? I have a bunch of fish food on the bare bottom that's breaking down pretty quickly. I also have lava rock that bubbled for a bit when I put it in.
