i will be putting the eco aqualizer to the test i have the me125 on my 130 gallon african cichlid tank i use to do water changes once a week i will start testing for a full month starting sat-day feb 5 if i dont have to do any water changes just topping off water and putting conditioner in then if that is the case we truly have an excellent product out there i test my water every week i will let u all know if this product truly works worth a try 180 day money back gurantee