Reef tank calculators that open into the planner
Each tool uses ReefCrafter sizing rules, shows the math, then sends the same gallons, goal, bioload, and tier into the build planner.
Protein skimmer size calculator
For most reefs, size the skimmer to 1.5x display gallons for light bioload, 2x for medium, and 2.5x for heavy.
Reef tank heater wattage calculator
Plan reef heating inside the 2.5-5 watts per gallon band, then split heat across two heaters on tanks 50g and up.
Reef tank flow calculator
Soft and LPS reefs often start around 10-20x turnover, mixed reefs around 20-40x, and SPS systems around 40-60x.
Return pump GPH calculator
Most sumped reef systems want roughly 5-10x system turnover delivered after head loss.
Reef lighting coverage calculator
A reef light has to cover the tank footprint and hit the PAR band for the coral goal.
Reef tank cost calculator
A real reef budget includes the startup cart, first-90-day supplies, consumables, and a margin for fixes.
Reef build checker
The safest pre-buy check is cross-category: tank, goal, bioload, light, flow, heat, filtration, and water all have to agree.
Want the full cross-check?
The calculators are fast single decisions. The planner combines the same numbers across equipment, budget, and livestock so one good choice does not hide another weak spot.