Aquarium calculators for your tank plan

Use your measurements and costs. Start with one question or keep the whole equipment plan together.

Check which fish fit your tank →

Draws your fish at adult size in your tank and checks tank size, temperature, group size and temperament.

Have ready: Your tank and the fish you are considering.

Explains ammonia, nitrite, nitrate, pH, KH and GH readings and what to do today.

Have ready: Your test kit readings.

Keep one plan for your tank’s water, equipment fit, weight and costs.

Have ready: Tank measurements and your equipment choices.

Find how much water your tank really holds from inside measurements or a measured fill.

Have ready: A tape measure and your tank’s inside size.

Add water, the empty tank, substrate, rocks, equipment and stand.

Have ready: Your tank’s water volume and the dry weight of each part.

Turn your chosen percentage into water and full or partial containers.

Have ready: Your tank’s water volume, the percentage you change and your bucket size.

See which heater size Aqueon’s and Fluval’s charts give for your tank and room.

Have ready: Your tank’s water volume, the coolest room temperature, the water temperature you want and whether the tank has a lid.

Measure your filter’s real flow and compare it with the ratings on the box.

Have ready: A bucket, a measuring jug and a timer.

Calculate energy and cost for the equipment you will run.

Have ready: The watts on each label, hours a day and your electricity rate.

Add up purchases, supplies and electricity for the first year; blank lines are left out.

Have ready: What you paid or plan to pay, and how often you replace supplies.

Turn the label of Seachem Flourish, Easy Green, API Leaf Zone or Tropica into mL for your tank, and count the root tabs your substrate takes.

Have ready: Your tank’s water volume, the bottle you have and the substrate’s length and depth.

Turn a pH and a KH reading into ppm of CO₂, with the usual target for planted tanks and a table to read it at a glance.

Have ready: A pH and a KH test from the same sample.

See the PAR a Fluval Plant 3.0 or 4.0 LED gives your plants at your tank’s depth, from Fluval’s own figures, and which plants grow there.

Have ready: Your light’s model and your tank’s height.

Work out the sand, gravel or planted substrate for your floor and depth, in pounds and bags for CaribSea’s substrates.

Have ready: The inside length and width of the tank and the depth you want.