Just doing a little research on this, and here is a quick summary of what I found. I think I'll post this one as well in another topic.
| Feature | Freshwater Tank | Saltwater Tank |
|---|
| Water Chemistry | Simpler: pH, ammonia, nitrite, nitrate | Complex: salinity, specific gravity, calcium, alkalinity |
| Testing Frequency | Weekly or biweekly | More frequent and precise testing |
| Filtration Needs | Standard filters (canister, sponge, HOB) | Advanced systems: protein skimmers, powerheads2 |
| Water Changes | Larger, less frequent (e.g., 25% weekly) | Smaller, more frequent to maintain stability |
| Startup Costs | Lower: basic gear and inexpensive fish | Higher: specialized equipment, live rock, salt mix |
| Lighting Requirements | Basic lighting for fish and plants | Specialized lighting for corals and marine life |
| Disease Management | Easier: freshwater fish are more adaptable | Tricky: marine species are more sensitive |
| Species Variety | Wide range of hardy, beginner-friendly fish | Exotic, vibrant species, but often delicate |
Quick Summary
- Freshwater tanks are more beginner-friendly, budget-conscious, and forgiving when it comes to water fluctuations.
- Saltwater tanks offer stunning biodiversity and coral ecosystems, but they demand precision, patience, and a higher level of investment.