Swordtail pH: Ideal Water pH & Hardness
Ideal pH 7-8.4 · Hardness 12-30 dGH
The Swordtail prefers neutral water: pH 7-8.4 at 12-30 dGH. Test your tap water first — many keepers match this range with no adjustment.
Stability beats a perfect number. Chasing pH with chemicals causes dangerous swings; if your water is close, leave it. To gently soften and lower pH use RO water, driftwood or peat; to raise it use crushed coral or aragonite.
| pH | 7-8.4 |
|---|---|
| Hardness | 12-30 dGH |
Frequently asked questions
What pH is best for Swordtail?
pH 7-8.4 with hardness 12-30 dGH.
How do I adjust pH for a Swordtail?
Favor stability: match it naturally with driftwood or RO water to lower, or crushed coral to raise, rather than pH chemicals.
More on this species: Swordtail full care guide · tank size · temperature · pH & hardness · tank mates