- Reaction score
- 3 years
I know RO/DI units are a must for SW so you don't introduce extra nutrients to the aquarium and prevent algae problems. But what I want to know is are they effective for FW? I'm thinking if my tap water is high in GH/KH, it may be introducing unnecessary nutrients. I been getting algae outbreaks lately and I even reduced lighting from 10 to 8 hours and haven't used Flourish comp for two weeks now. My phosphate test shows I only have 0.25-0.5 ppm.