The Drudge Report has been going down hill. But the post debate cover/home page is a full.on TDS sufferer's fantasy. Was it sold or he let's the staff do everything.
I just started about a month now and bought a used ro/di 75gpd system. I decided I wanted to do it right the first time. Owner said he used it only for about 400 gallons. I waited and fill the 75 g tank plus sump. 4 weeks later I see all sort of algae and sand turning red. I bought a tds meter finally and my water is 46ppm and after ro/di 23ppm. Should I change all 3 filters (micron, sedi, di ...
TDS of 4 is not bad but thats when I usually plan on changing the DI resin. Like mentioned above the storage tank could have 'collected' dust and other items that raised the TDS. I'd also test the TDS before the DI resin, will let you know how well the filters are doing, higher numbers (10+) indicate time to think about replacing the filters.
Conductivity sensors have a much higher resolution and are industry standard for measuring water quality on purified water systems. In other words a tds meter can show 0 and the conductivity meter will still give you a reading. That being said I don't think it's necessary to be concerned with levels of purity beyond 0 tds for a fish tank.
- If my supply water is 196 tds, should I get 0 tds product water? It is a new kent maxxima 60 gpd hi-s unit. I ran it for appoximately 15 gallons without the di filter to wet the membrane. Before I put the di filter in, the water measured 11 tds, after I installed the di it was 2 tds.