Hello! My husband and I are new to aquariums but we have done a lot of research. Our tank is about 2months old and was doing well until the penguin filter died on us. It is a 29 gallon freshwater, tropical tank with a tetra whisper, fish: 3 tetra, 3 cory cats and a sucker fish (unsure of his name at the moment), with 8 bioballs. Our guppies (6) died last night. Our nitrites are normal and nitrates are normal but the ammonia level is sky high 8. We have been dealing with the high ammonia for a while and can't seem to find the right answer from any fish store. In the beginning when all was going well I was doing a 10% water change weekly and I was told that was bad. The penguin filter died at 4 weeks and that was when I was told to leave the water alone period! I couldn't do that knowing there was high ammonia so I would do 25% water changes every other day and then was told by Petsmart just leave it alone and let it cycle. Last night we lost all of the guppies we had so this morning we emptied the tank and have our remaining fish in a bucket with a bit of old and new water. We cleaned the tank, washed the filter off in the water we took out, put tap water with conditioner back in the tank and the ammonia level is .5-1. Is it safe to put our fish back in? Will I need to do a 10%, 50%, or 75% water change again tomorrow? Should I do water changes until the ammonia is 0? Help