https://lagonia.org/tools/ Recent content in Aquarium calculators on Lagonia Hugo en-gb https://lagonia.org/ammonia-calculator/ Mon, 01 Jan 0001 00:00:00 +0000 https://lagonia.org/ammonia-calculator/ Work out how much household ammonia to add to hit a target ammonia level for a fishless cycle, from your tank volume and the strength of the solution. https://lagonia.org/calculators/ Mon, 01 Jan 0001 00:00:00 +0000 https://lagonia.org/calculators/ Free freshwater aquarium calculators: tank volume, fish stocking, heater wattage, substrate, CO2, fertiliser (EI) dosing, remineralisation, water changes, fishless-cycle ammonia and running cost. https://lagonia.org/co2-calculator/ Mon, 01 Jan 0001 00:00:00 +0000 https://lagonia.org/co2-calculator/ Work out dissolved CO2 in your planted aquarium from pH and KH, with a safe-range guide, plus a rough planted-tank lighting estimate. https://lagonia.org/heater-calculator/ Mon, 01 Jan 0001 00:00:00 +0000 https://lagonia.org/heater-calculator/ Work out the right aquarium heater wattage for your tank from its volume and how far above room temperature you need to hold it. https://lagonia.org/remineralise-calculator/ Mon, 01 Jan 0001 00:00:00 +0000 https://lagonia.org/remineralise-calculator/ Work out how much gypsum, Epsom salt and baking soda to add to RO or soft water to hit a target GH and KH, with a chosen calcium-to-magnesium ratio. Cheap DIY remineralisation. https://lagonia.org/running-cost-calculator/ Mon, 01 Jan 0001 00:00:00 +0000 https://lagonia.org/running-cost-calculator/ Estimate what your aquarium costs to run: heater, filter and lighting electricity per day, month and year, from their wattage and your electricity price. https://lagonia.org/stocking-calculator/ Mon, 01 Jan 0001 00:00:00 +0000 https://lagonia.org/stocking-calculator/ A free freshwater aquarium stocking calculator based on metabolic fish weight and filtration, not the inaccurate inch-per-gallon rule. Checks stocking level, group sizes, tank size and water-hardness suitability. https://lagonia.org/substrate-calculator/ Mon, 01 Jan 0001 00:00:00 +0000 https://lagonia.org/substrate-calculator/ Work out how much sand, gravel or aquasoil you need for your aquarium, in litres and kilograms, from the tank footprint and the depth you want. https://lagonia.org/volume-calculator/ Mon, 01 Jan 0001 00:00:00 +0000 https://lagonia.org/volume-calculator/ Work out your aquarium's volume in litres, US gallons and UK gallons from its dimensions, for rectangle, cube, cylinder, hexagon, bowfront and corner tanks. https://lagonia.org/water-change-calculator/ Mon, 01 Jan 0001 00:00:00 +0000 https://lagonia.org/water-change-calculator/ Work out how big a water change you need to bring nitrate or TDS from its current level down to a target, allowing for what your tap water already contains. https://lagonia.org/fertiliser-calculator/ Mon, 01 Jan 0001 00:00:00 +0000 https://lagonia.org/fertiliser-calculator/ Work out how many grams of dry salts (KNO3, KH2PO4, K2SO4, CSM+B traces) to dose your planted aquarium to hit target N, P, K and Fe, with EI and lean presets. https://lagonia.org/ro-mix-calculator/ Mon, 01 Jan 0001 00:00:00 +0000 https://lagonia.org/ro-mix-calculator/ Work out how much reverse-osmosis, rain or distilled water to blend with hard tap water to hit a target GH, for shrimp, tetras, apistos and other soft-water fish. Ratio and litres of each.