Hiya, Some of you may have read about my guppies in my 20L tank, They are getting their new home tomorrow 60L tank. They swim happily, explore the tank and follow each other around nicely. They will even take fish flakes from me if I hold them in the water. My question is, Ive just check the PH and ammonia levels in the tank (getting my other test for nitrites? tomorrow) and PH is 7 and ammonia is 0ppm. Ive been doing regular water changes but not done one since last night, do I need to keep doing such regular changes if my ammonia levels are 0ppm when I test or will it be ok if I just drop the changes down to every other day?