i have a 10G tank set up with newly born platie fry ( about 8, about a week old), one pleco, two glost shrimp ,and one snail. but the tank seams to alway have a very high ammonia i do a 25% water change but with in a day the ammonia test high. any information will help my 20g tank is doing well. i only been doing Aquarium for 4 months. pls. help