# The Aquarium Calculators

> Peer-reviewed aquarium calculators, biological load models, fish compatibility databases, plant profiles, water chemistry benchmarks, and disease diagnosis protocols.

The Aquarium Calculators provides precision tools for aquarists, aquascapers, and fishkeepers. All calculators use established aquatic biological equations and peer-reviewed water chemistry standards.

## Core Calculators
- [Aquarium Bioload & Stocking Calculator](https://www.theaquariumcalculators.com/calculators/stocking-calculator/): Calculates stocking capacity and biological load margin based on fish species, size, and system volume.
- [True Water Volume Calculator](https://www.theaquariumcalculators.com/calculators/true-water-volume/): Computes net water volume by accounting for substrate displacement, hardscape, and glass thickness.
- [Aquarium Heater Wattage Calculator](https://www.theaquariumcalculators.com/calculators/aquarium-heater-wattage-calculator/): Determines required heater wattage and dual-heater redundancy based on ambient-to-target temperature delta.
- [Aquarium Substrate Calculator](https://www.theaquariumcalculators.com/calculators/substrate-calculator/): Computes substrate volume and dry weight (lbs/kg) for gravel, sand, and aquasoil at target depths.
- [Aquarium PAR Lighting Calculator](https://www.theaquariumcalculators.com/calculators/aquarium-par-calculator/): Estimates Photosynthetically Active Radiation (PAR) at substrate level for planted aquascapes.
- [Filter Turnover Calculator](https://www.theaquariumcalculators.com/calculators/filter-turnover-calculator/): Recommends optimal GPH/LPH flow rates based on bioload and filter mechanism (HOB, canister, sponge, sump).
- [Aquarium Floor Weight Calculator](https://www.theaquariumcalculators.com/calculators/aquarium-floor-weight-calculator/): Evaluates structural load (lbs/sq ft) on residential joists for medium and large aquariums.
- [Aquarium Electricity Cost Calculator](https://www.theaquariumcalculators.com/calculators/aquarium-electricity-cost-calculator/): Estimates monthly and annual operating power costs for heaters, pumps, and LED fixtures.
- [Aquarium Salt Dosing Calculator](https://www.theaquariumcalculators.com/calculators/salt-dosing-calculator/): Safe dosing ratios for therapeutic salt baths, general tonic, and parasite eradication.
- [Water Change Schedule Calculator](https://www.theaquariumcalculators.com/calculators/water-changes-calculator/): Dilution curves predicting nitrate reduction over recurring water change volumes.
- [CO2 Cylinder Lifespan Calculator](https://www.theaquariumcalculators.com/calculators/co2-cylinder-calculator/): Estimates pressurized CO2 bottle longevity based on bubble rate (BPS) and photoperiod.
- [Fish Species Compatibility Calculator](https://www.theaquariumcalculators.com/calculators/compatibility-calculator/): Cross-evaluates species by temperature overlap, pH delta, swimming layer, and behavioral temperament.
- [Ammonia Toxicity Calculator](https://www.theaquariumcalculators.com/calculators/ammonia-toxicity-calculator/): Computes toxic un-ionized free ammonia (NH3) vs non-toxic ammonium (NH4+) based on pH and temperature.
- [Nitrite Toxicity Calculator](https://www.theaquariumcalculators.com/calculators/nitrite-toxicity-calculator/): Evaluates methemoglobinemia risk and chloride protection ratios in freshwater tanks.
- [Fish Disease Diagnostic Tool](https://www.theaquariumcalculators.com/calculators/fish-diagnostic-tool/): Interactive symptom-matching tool for diagnosing parasitic, fungal, and bacterial fish diseases.
- [Quarantine Tank Protocol Calculator](https://www.theaquariumcalculators.com/calculators/quarantine-calculator/): Dosing, observation duration, and preventative protocols for new fish quarantine.

## Species & Flora Directories
- [Aquarium Fish Species Directory](https://www.theaquariumcalculators.com/fish/): Detailed care profiles for 140+ freshwater and marine fish species, including minimum tank size, temperature, pH, diet, and temperament.
- [Aquarium Plants Directory](https://www.theaquariumcalculators.com/plants/): Profiles, PAR lighting demands, CO2 requirements, growth rates, and aquascape placement for live aquatic plants.

## Water Chemistry & Diagnostics
- [Aquarium Water Chemistry Directory](https://www.theaquariumcalculators.com/chemistry/): Parameter safe ranges, molecular formulas, and toxicity benchmarks for Ammonia, Nitrite, Nitrate, pH, and KH/GH buffer stability.
- [Fish Diseases & Treatment Directory](https://www.theaquariumcalculators.com/diseases/): Hospital tank protocols, symptoms, and medication dosing for Ich, Velvet, Fin Rot, Dropsy, and Columnaris.
- [Aquarium Care Topics & Fundamentals](https://www.theaquariumcalculators.com/topics/): In-depth guides on nitrogen cycling, biofiltration mechanics, algae control, and tank maintenance.

## Optional
- [Aquarium Guides & Articles Blog](https://www.theaquariumcalculators.com/blog/): Husbandry blueprints, troubleshooting breakdowns, and equipment reviews.
- [Editorial Policy & Scientific Review](https://www.theaquariumcalculators.com/editorial-policy/): Scientific consensus sources, veterinary literature benchmarks, and calculation validation standards.
- [How We Test](https://www.theaquariumcalculators.com/how-we-test/): Physical laboratory testing protocols, hydrometer/refractometer calibrations, and sensor benchmark methods.