Tools

Tank volume

Rectangular, bowfront, cylindrical, hex, and custom shapes. Reports gallons (US and imperial) and liters.

Fish stocking calculator

Bioload, schooling minimums, and weekly water change estimates. Replacement for the ancient AqAdvisor.

Water change

How much water to swap to bring nitrate, TDS, or any dilutable parameter down to a target value.

Heater wattage

How many watts of heating you need. Quick rule-of-thumb mode or physics-based detailed mode for non-standard tanks and unusual rooms.

Substrate volume

Substrate volume for a tank footprint plus depth. Estimates bag counts for common aquasoil, sand, and gravel products.

Tank weight calculator

Total weight on your floor: water, glass, substrate, hardscape, and stand. For anyone worried about putting a tank upstairs.

Medication dosing

Calculate the right dose for common aquarium medications, with species warnings based on your stocking.

GH / KH remineralizer

How much remineralizer to add to RO or distilled water to hit a target GH (and KH if the product raises both).

Nutrient dosing

EI, EI-lite, PPS-Pro, and commercial liquid dosing for planted tanks. Reads your saved plant roster to suggest a method.

CO2 / pH / KH calculator

Estimate dissolved CO2 in your planted tank from pH and KH readings.

Aquarium lighting

PAR-at-substrate targets by plant tier. Enter your fixture PAR-at-surface and tank depth, see which plants will thrive.

Planted tank planner

Pick the plants you want to keep, get a substrate recommendation, water parameter range, light and CO2 requirements, and fish-compatibility warnings.

EC / PPM converter

Switch readings between EC, 500 scale, 640 scale, and 700 scale. Because not all meters speak the same language.

VPD (vapor pressure deficit)

Calculate vapor pressure deficit from temperature and humidity. The variable serious indoor growers actually watch.

Nutrient mix

Hydroponic nutrient mixing by crop and stage. Masterblend dry salts, GH Flora liquid trio, or generic EC target.

Garden planner

Pick a growing system, add crops, get compatibility findings. Works for soil beds and hydroponic systems.

Grow light

DLI calculator for hydroponic and indoor aquaponic crops. Enter your PPFD reading and photoperiod, see if you're hitting the crop's daily light target.

Aquaponics system designer

Plan a complete aquaponics system: fish stocking, tank location, grow area, multiple bed types in one loop, with thermal and chemistry checks across the whole design.

System sizing

Fish tank to grow bed ratio, pump capacity, feed rate, sump volume. UVI-style sizing from any starting point.

Fish-to-plant ratio

Does your fish stocking match your grow bed area? Nitrogen supply vs nitrogen demand.

Running cost

Electricity cost estimates for an aquaponics, hydroponics, or planted aquarium setup. Add your equipment, set a local rate, see the monthly and yearly bill.

Daily energy load

Add up everything that needs to run off your solar setup. Foundation for sizing panels, batteries, and inverter.

Solar array sizing

Daily energy load plus your location's peak sun hours plus system losses, all gets you to required panel wattage.

Battery bank sizing

How much battery capacity (Ah at your system voltage) you need to ride through cloudy days without the lights going out.

Inverter sizing

Inverter continuous rating and surge rating for your loads. Sized wrong, you trip the inverter or burn it out.

Pump runtime from battery

How long a load will run on a battery bank. Accounts for battery chemistry, depth of discharge, and inverter losses.

Off-grid system cost

Rough budget across panels, batteries, inverter, charge controller, and mounting hardware. Pulls together what the sizing calcs tell you into a real dollar number.