Originally Posted by
Dogstar
Distilled water is fine for toping off and no need to buffer, just add it in slowly...its the best choice of the three listed and I would never choose the other two...never know whats in tap or spring water...do you.
Agreed
I have used distilled water for top-off for over a year and worked great, cleared up my algea problem, But the water was for a distillation system I had installed at are plant, so I know it was 100% distilled water.