Keep stock alive — and the maths honest.

53 Aquaculture calculators

Every calculator in this category, by its reference code. Running them needs a Tenselo subscription — subscriptions open soon.

• AQR-001 Biofloc Carbon Dose

  Carbohydrate addition to control ammonia heterotrophically in biofloc systems (C:N basis)

• AQR-002 FCR & Feed Cost

  Feed conversion ratio, feed cost per kg gain and gross value

• AQR-003 Feed Protein to TAN Load

  Ammonia (TAN) production from feed - the master input for biofilter sizing

• AQR-004 Feed Rate & Daily Feed Load

  Daily/weekly/monthly feed, cost and the TAN-driving feed load

• AQR-005 Fish Grading Split

  Counts, biomass and tanks per size grade within density limits

• AQR-006 Fish Growth & Harvest Forecast

  Days to harvest, harvest date and biomass from SGR

• AQR-007 Fish Stocking Density & Biomass

  Current vs maximum biomass and stocking density, with spare capacity

• AQR-008 Nitrate Build-up & Water Exchange

  Nitrate rise and the water exchange needed to stay below a target

• AQR-009 Nitrification Alkalinity Consumption

  Alkalinity used by nitrification and the buffer chemical needed to hold it

• AQR-010 Nitrite Toxicity & Chloride Protection

  Chloride:nitrite ratio check and the salt dose to protect fish

• AQR-011 Un-ionised Ammonia (NH3) Toxicity

  Toxic NH3 fraction from TAN, pH, temperature & salinity (Emerson 1975)

• AQR-012 Biofilter Sizing - Moving Bed (MBBR)

  Media volume & tank size for a moving-bed nitrifying biofilter

• AQR-013 Biofilter Sizing - Trickling / Fixed Bed

  Media area, volume, plan area and footprint for a fixed-media biofilter

• AQR-014 Carrying Capacity by Biofilter

  Maximum feed and biomass your biofilter can support

• AQR-015 Carrying Capacity by Hydraulic Flow

  Maximum biomass from flow-per-kg and tank turnover limits

• AQR-016 Carrying Capacity by Oxygen

  Maximum fish biomass your oxygen system can support

• AQR-017 Aeration Diffuser Grid Sizing

  Air flow, diffuser count and blower pressure for diffused aeration

• AQR-018 CO2 Production & Degassing

  CO2 made by the system and the air flow / degasser to strip it out

• AQR-019 Emergency Oxygen Backup

  Oxygen storage to keep fish alive through a pump/power/aeration failure

• AQR-020 Oxygen Cone / LHO Sizing

  Oxygen gas flow and transfer check for a cone or low-head oxygenator

• AQR-021 Oxygen Demand - Fish + Biofilter

  Total O2 demand from fish, feed and nitrification (peak & required transfer)

• AQR-022 Oxygen Supersaturation / Gas Bubble Disease

  DO % saturation, total gas pressure and GBD risk

• AQR-023 Aquaculture Sludge Dewatering

  Dry solids, wet sludge, dewatered cake and polymer from feed

• AQR-024 Drum Filter Sizing

  Screen area, solids capture and backwash water for a microscreen drum filter

• AQR-025 Foam Fractionator / Protein Skimmer

  Skimmer flow, contact volume and air for foam fractionation

• AQR-026 Ozone Dose for Aquaculture

  Ozone generator size, contact tank and bromate/off-gas safety for RAS

• AQR-027 Settling Cone / Radial Flow Settler

  Surface area, vessel diameter and retention for settleable-solids removal

• AQR-028 UV Dose for Aquaculture

  Delivered UV dose after UVT, fouling and lamp ageing vs the target

• AQR-029 Circular Tank Inlet Hydraulics

  Inlet jet velocity, indicative rotational velocity and solids sweep

• AQR-030 Intake Screen Approach Velocity

  Fish-safe screen area from intake flow and approach-velocity limit

• AQR-031 Make-up Water Requirement

  Daily make-up and discharge from exchange, backwash, purge & evaporation

• AQR-032 RAS Mass Balance Summary

  One-page design summary - loads, sizes and the limiting bottleneck

• AQR-033 RAS Tank Turnover Flow

  Recirculation flow, residence time and pump arrangement

• AQR-034 Salinity / Salt Addition

  Salt to raise salinity or chloride, with a species-limit check

• AQR-035 Temperature Heating / Chilling Load

  Heat-up energy, hold load and running cost for a heater/chiller/heat-pump

• AQR-036 Fry / Fingerling Tank Sizing

  Tank volume, count, flow and feed for a nursery batch

• AQR-037 Hatchery Egg Incubator Flow

  Flow, oxygen and unit count for egg jars / trays / troughs

• AQR-038 Hatchery Incubation Degree-Days

  Hatch date forecast from accumulated temperature (degree-days)

• AQR-039 Pond Aeration Sizing

  Aerator power & count for ponds, with night low-DO risk

• AQR-040 Pond Turnover / Circulation Pumping

  Flow, pump duty, power and running cost for pond circulation/exchange

• AQR-041 Predator / Bird Netting Load

  Support-cable load, sag and tension for pond/tank bird netting (indicative)

• AQR-042 Raceway Flow & Velocity

  Velocity, residence time, turnover and solids transport for a raceway

• AQR-043 Fish Acclimation / Salinity Change Rate

  Safe acclimation time and drip/exchange flow for temp & salinity change

• AQR-044 Fish Transport Tank Oxygen

  Oxygen, loading and DO check for live-fish transport

• AQR-045 Harvest Ice Requirement

  Ice to chill and hold harvested fish, with ice:fish ratio

• AQR-046 Live Fish Transport CO2 Build-up

  CO2 produced and final concentration in a transport tank

• AQR-047 Processing Wash Water Demand

  Wash water, peak flow and wastewater volume for fish processing

• AQR-048 Purge / Depuration Tank Sizing

  Tank volume, flow and oxygen for holding/purging before harvest

• AQR-049 Aquaculture Water Analysis Interpreter

  Full water test -> per-parameter status, NH3/nitrite/CO2 risk and treatment actions

• AQR-050 Biosecurity Footbath / Dip Dose

  Disinfectant product per footbath / equipment dip, with refresh schedule

• AQR-051 Mortality Event Response

  Oxygen, ammonia and water-exchange response after a die-off

• AQR-052 Quarantine System Sizing

  Tank, flow, feed, ammonia, oxygen and biofilter for a quarantine batch

• AQR-053 RAS Alarm & Backup Capacity Check

  Time-to-unsafe-DO vs backup & response - protected / vulnerable / critical