In theory if you were not using rodi sysystem, could you use dehumidifier water? could you use the water to top off or do water changes. It is distilled and has low ppms 10-20ppms. Just curious what people's thoughts were
Don't use the water from a dehumidifier. If you are looking to save a buck use rain water. Collect well into the storm and use some floss to filter out bits of stuff as the water is being collected. Pump it over some activated carbon and you are good to go (in my experience).