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Calculators

Reef Tank Calculators - Test

Tropic Marin Hydrometer Correction

~0.0002 SG adjustment per °C from 25°C/77°F.

Measured SG: Temperature °F:

Results will appear here...

Target: 1.025–1.027 SG

Water Volume Estimator

Rectangular tank with displacement estimate.

Length (in): Width (in): Water Height (in): Displacement %: Sump (gal):

Results will appear here...

Typical: 10–20% displacement.

Phosphorus to Phosphate Converter

ppb P × 3.066 / 1000 = ppm PO₄ (Hanna-style).

Value: Convert:

Results will appear here...

Target: <0.03–0.10 ppm PO₄

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