Somewhat of a long story so I'll try to use bullet points and keep it readable. Moved into a house a year ago with a small backyard pond stocked with goldfishHave 2 young kids who were becoming too comfortable around the water so we decided to drain it (plus it took up too much room in the small backyard)Went to fish store to purchase aquarium to house the 3 remaining goldfish. Went with a 29g tankAdvised fish store guy that we had no experience with fish and he told us to run the tank empty for a week and we should be good to move the fish inTransferred fish into the tank and thought we were goldenFound out about new tank syndrome and cycling from the interwebsAbout a week and a half in after doing 20% water changes 3 times a week I bought a test kit and found ammonia readings around 8ppmProceeded with daily 50% water changes daily to bring the ammonia levels back down to below 1ppm and started with daily 20% water changes to try to keep it in check3 days later the ammonia readings are back up to 4ppmFish have been eating all food put in tank within 5 minutes My questions are:Is there anything I can do to keep ammonia levels within reason without having to swap out 15g of water a day?Could I be overfeeding the fish which could contribute to ammonia levels? If you need any further info please let me know. Thanks!