Hi all, I was wondering how often you change your water? I have heard that weekly water changes are beneficial but I have also heard that water changes are only needed when there is an imbalance to the water chemistry. I ask because I am once again having a difficult sustaining an exceptable level of nitrates for my planted tank. I constantly am getting a reading of 0 -5 nitrates. I dose with dry ferts and have to dose my tank with what feels like a lot of ferts to acheive anything higher than a reading of 5. Would cutting back the water changes help develop more nitrates in the tank?