Pygmy Corydoras pH: Ideal Water pH & Hardness
Ideal pH 6.2-7.4 · Hardness 2-12 dGH
The Pygmy Corydoras prefers neutral water: pH 6.2-7.4 at 2-12 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 | 6.2-7.4 |
|---|---|
| Hardness | 2-12 dGH |
Frequently asked questions
What pH is best for Pygmy Corydoras?
pH 6.2-7.4 with hardness 2-12 dGH.
How do I adjust pH for a Pygmy Corydoras?
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: Pygmy Corydoras full care guide · tank size · temperature · pH & hardness · tank mates