Thanks mate but honestly I don't even bother with water testing, I'm a big believer in 50% water changes on a weekly basis & it has served me well. In saying that, maybe my attitude will have to change with a mini swimming pool in my garage, water is a precious these days & so is my water bill.PaleAle, big tanks are easier by a long shot. The balance is easier to maintain and once it's cycled it seems to maintain equilibrium easier and for longer stretches.