- Use a RO/DI System. A reverse osmosis deionization system filters out all the particles in the water that goes through it, even stripping away the minerals.
- Add Aquarium Soil.
- Add Driftwood.
- Add Other Sources of Tannins.
Is hard or soft water better for fish?
Soft water (low mineral) is typically low in pH. The mineral in hard water acts as a buffer that combats aridification in the water. The resulting water will be more alkaline and higher in pH. Some species of fish require hard water while others require soft water.
Can I use hard tap water in my fish tank?
Some tap water may contain high levels of iron or magnesium. Other tap water may contain trace amounts of ammonia or asbestos that can wreak havoc on delicate fish. Another issue with using municipal tap water for a fish tank is that it often contains chlorine, which many public water facilities use as a decontaminant.
What fish do well in hard water?
- Livebearers such as Guppies, Mollies, Platies, and Swordtails.
- Paradise Fish.
- African and some Central American Cichlids.
- Brackish fish such as Archers, Monos, and Scats.