Dialing In Water Parameters for Caridina Shrimp

Caridina shrimp — Crystal Red, Crystal Black, Tiger, Blue Bolt — need softer, more acidic water than Neocaridina. Getting this right up front will save you a lot of frustration.

Target ranges

Parameter	Target
pH	6.2–6.8
GH	4–6
KH	0–2
TDS	100–150 ppm
Temperature	68–74°F (20–23°C)

Substrate matters

An active, buffering substrate designed for shrimp will hold pH low and stable far better than inert gravel or sand. Expect to replace it every 12–18 months as its buffering capacity is exhausted.

Acclimation

Caridina are far less tolerant of sudden parameter swings than Neocaridina. Drip acclimate new arrivals over 60–90 minutes, and avoid large water changes in the weeks after introducing new stock.

Watch for

• Molting problems (usually low GH or calcium)
• Lethargy after water changes (TDS swing)
• Reduced coloration (often stress or a diet lacking astaxanthin)

Patience pays off — a stable Caridina tank can run for years with only routine top-offs and small weekly water changes.