ihasanzongi
Fish Crazy
i want to change my gravel to a more natural looking one, as i have some bright colour ones. im sure that my fish will enjoy a new one. but i was wondering if i take my gravel out and put a new one in if it my tank will loose any bacterica or any thing esle, i dont want to mess up my tank.. this is for my 20 gallon that has been cycled.