{
  "@type": "CollectionAPI",
  "section": "calculators",
  "base_url": "https://fastaquatics.com/calc/",
  "generated": "2026-05-07T13:09:10.490Z",
  "count": 29,
  "items": [
    {
      "slug": "acclimation-drip",
      "url": "https://fastaquatics.com/calc/acclimation-drip/",
      "title": "Drip Acclimation Calculator",
      "description": "Calculate drip acclimation time + drops-per-second target for new fish. Especially important for sensitive species (wrasses, anthias, shrimp, snails).",
      "last_modified": "2026-05-07T04:24:01.426Z"
    },
    {
      "slug": "auto-topoff-rate",
      "url": "https://fastaquatics.com/calc/auto-topoff-rate/",
      "title": "Aquarium Evaporation + ATO Calculator",
      "description": "Calculate daily evaporation in gallons + suggested auto top-off (ATO) reservoir size. Surface area + temperature + ambient humidity drive evaporation rate.",
      "last_modified": "2026-05-07T04:24:01.427Z"
    },
    {
      "slug": "co2-bps",
      "url": "https://fastaquatics.com/calc/co2-bps/",
      "title": "Planted Tank CO2 Bubble Counter Calculator",
      "description": "Free CO2 BPS (bubbles per second) calculator for planted tanks. Enter tank volume + target ppm + plant load, get the bubble count target. Achieve green drop checker = ~30 ppm.",
      "last_modified": "2026-05-07T02:29:42.594Z"
    },
    {
      "slug": "co2-ppm",
      "url": "https://fastaquatics.com/calc/co2-ppm/",
      "title": "Planted Tank CO2 PPM Calculator",
      "description": "Calculate dissolved CO2 ppm in a planted aquarium from KH (degrees of carbonate hardness) and pH. Target 25-30 ppm for high-light planted tanks.",
      "last_modified": "2026-05-07T04:24:01.422Z"
    },
    {
      "slug": "cycle-eta",
      "url": "https://fastaquatics.com/calc/cycle-eta/",
      "title": "Tank Cycling ETA Calculator",
      "description": "Free tank cycling timeline calculator. Enter tank type + bacteria source, get the estimated days to complete cycle. Plan your stocking date with confidence.",
      "last_modified": "2026-05-07T02:29:42.595Z"
    },
    {
      "slug": "ei-fertilizer-dosing",
      "url": "https://fastaquatics.com/calc/ei-fertilizer-dosing/",
      "title": "EI Fertilizer Dosing Calculator (Planted Tanks)",
      "description": "Free EI (Estimative Index) fertilizer dosing calculator for planted aquariums. Enter tank volume + plant load, get exact teaspoons of KNO3, KH2PO4, K2SO4, and CSM+B per dose.",
      "last_modified": "2026-05-07T02:29:42.595Z"
    },
    {
      "slug": "electricity-cost",
      "url": "https://fastaquatics.com/calc/electricity-cost/",
      "title": "Aquarium Electricity Cost Calculator",
      "description": "Free aquarium electricity cost calculator. Enter your equipment wattage + run hours + electric rate, get monthly + annual cost. Plan budget before adding new equipment.",
      "last_modified": "2026-05-07T02:29:42.595Z"
    },
    {
      "slug": "filter-turnover",
      "url": "https://fastaquatics.com/calc/filter-turnover/",
      "title": "Filter Turnover Calculator",
      "description": "Free filter sizing calculator. Enter tank volume + tank type (community, planted, reef, predator) and get target gallons-per-hour for proper turnover.",
      "last_modified": "2026-05-07T04:24:01.425Z"
    },
    {
      "slug": "fishless-cycle-ammonia",
      "url": "https://fastaquatics.com/calc/fishless-cycle-ammonia/",
      "title": "Fishless Cycle Ammonia Dosing Calculator",
      "description": "Free fishless cycle ammonia dosing calculator. Enter tank volume + target ammonia ppm, get the exact mL of pure ammonia (Dr. Tim's, Janitorial Strength, or Ace Hardware) to dose. Cycle in 4-6 weeks.",
      "last_modified": "2026-05-07T02:29:42.596Z"
    },
    {
      "slug": "frag-pricing",
      "url": "https://fastaquatics.com/calc/frag-pricing/",
      "title": "Coral Frag Pricing Calculator",
      "description": "Free coral frag pricing calculator. Enter coral type + grade + size and get a fair-market price range. Compares budget vs designer named morphs.",
      "last_modified": "2026-05-07T05:48:06.701Z"
    },
    {
      "slug": "heater-wattage",
      "url": "https://fastaquatics.com/calc/heater-wattage/",
      "title": "Aquarium Heater Wattage Calculator",
      "description": "Free heater wattage calculator. Enter tank volume + room temperature + target tank temperature, get the recommended heater wattage. Avoid undersized heaters that cycle constantly + oversized ones that overshoot target.",
      "last_modified": "2026-05-07T02:29:42.596Z"
    },
    {
      "slug": "par-estimator",
      "url": "https://fastaquatics.com/calc/par-estimator/",
      "title": "Reef Tank PAR Target Estimator",
      "description": "Free PAR target estimator for reef tanks. Enter tank depth + livestock type, get target PAR range at the placement. Helps size LED fixtures + photoperiod.",
      "last_modified": "2026-05-07T02:29:42.597Z"
    },
    {
      "slug": "pond-pump-sizing",
      "url": "https://fastaquatics.com/calc/pond-pump-sizing/",
      "title": "Pond Pump Sizing Calculator",
      "description": "Free pond pump sizing calculator. Enter pond volume + waterfall height + pond type (koi, goldfish, planted) and get the recommended pump GPH + brand suggestions.",
      "last_modified": "2026-05-07T05:48:06.703Z"
    },
    {
      "slug": "powerhead-flow",
      "url": "https://fastaquatics.com/calc/powerhead-flow/",
      "title": "Aquarium Powerhead + Flow Calculator",
      "description": "Free powerhead and flow calculator. Enter tank size + livestock type, get target turnover (GPH) + recommended powerhead count and brand suggestions.",
      "last_modified": "2026-05-07T02:29:42.598Z"
    },
    {
      "slug": "protein-skimmer-sizing",
      "url": "https://fastaquatics.com/calc/protein-skimmer-sizing/",
      "title": "Protein Skimmer Sizing Calculator",
      "description": "Free protein skimmer sizing calculator. Enter total system volume + bioload tier and get the recommended skimmer rating with brand suggestions.",
      "last_modified": "2026-05-07T05:48:06.700Z"
    },
    {
      "slug": "quarantine-timeline",
      "url": "https://fastaquatics.com/calc/quarantine-timeline/",
      "title": "Quarantine Tank Timeline Calculator",
      "description": "Free QT timeline calculator. Build a treatment + observation schedule for new fish based on saltwater vs freshwater + selected protocols (copper, prazi, tank transfer).",
      "last_modified": "2026-05-07T04:24:01.427Z"
    },
    {
      "slug": "reef-build-cost",
      "url": "https://fastaquatics.com/calc/reef-build-cost/",
      "title": "Reef Tank Build Budget Calculator",
      "description": "Free reef tank budget calculator. Enter tank size + build tier, get estimated cost breakdown for tank, stand, sump, lighting, flow, skimmer, ATO, controller, and livestock budget.",
      "last_modified": "2026-05-07T02:29:42.598Z"
    },
    {
      "slug": "reef-dosing",
      "url": "https://fastaquatics.com/calc/reef-dosing/",
      "title": "Reef 2-Part Dosing Calculator",
      "description": "Free 2-part calcium + alkalinity dosing calculator. Enter tank volume + current/target Ca + Alk, get exact mL of Bionic / B-Ionic / Tropic Marin Carbo to dose. Includes magnesium balance check.",
      "last_modified": "2026-05-07T02:29:42.599Z"
    },
    {
      "slug": "reef-recovery-dosing",
      "url": "https://fastaquatics.com/calc/reef-recovery-dosing/",
      "title": "Reef Crash Recovery Dosing Calculator",
      "description": "Free reef recovery calculator. After a parameter crash, calculate the right alkalinity, calcium, and magnesium top-up to gradually restore reef chemistry without further stressing corals.",
      "last_modified": "2026-05-07T05:48:06.704Z"
    },
    {
      "slug": "rodi-membrane-life",
      "url": "https://fastaquatics.com/calc/rodi-membrane-life/",
      "title": "RODI Membrane Life Calculator",
      "description": "Free RODI membrane life calculator. Enter tap TDS + RODI usage, predict when to replace the RO membrane and DI resin. Save money by replacing only when needed.",
      "last_modified": "2026-05-07T02:29:42.599Z"
    },
    {
      "slug": "salinity-converter",
      "url": "https://fastaquatics.com/calc/salinity-converter/",
      "title": "Saltwater Salinity Converter",
      "description": "Convert between specific gravity (1.020-1.030), salinity ppt (parts per thousand), and conductivity (mS/cm). Reef-safe range: 1.025-1.026 SG / 35 ppt.",
      "last_modified": "2026-05-07T04:24:01.423Z"
    },
    {
      "slug": "salt-mix",
      "url": "https://fastaquatics.com/calc/salt-mix/",
      "title": "Saltwater Salt Mix Calculator",
      "description": "Free saltwater mix calculator. Enter water volume + target salinity, get the exact ounces of salt mix to add. Avoid the bag-then-test waste cycle.",
      "last_modified": "2026-05-07T02:29:42.600Z"
    },
    {
      "slug": "sand-bed-depth",
      "url": "https://fastaquatics.com/calc/sand-bed-depth/",
      "title": "Aquarium Sand Bed Depth Calculator",
      "description": "Free sand bed depth calculator. Get the right substrate depth for your tank type - shallow sand bed (SSB) for reef, deep sand bed (DSB) for denitrification, or planted-tank depth for root feeders.",
      "last_modified": "2026-05-07T05:48:06.702Z"
    },
    {
      "slug": "substrate-amount",
      "url": "https://fastaquatics.com/calc/substrate-amount/",
      "title": "Aquarium Substrate Calculator",
      "description": "Calculate pounds of sand, gravel, or planted-tank substrate needed for any aquarium. Enter footprint + desired depth and get pounds + bags needed.",
      "last_modified": "2026-05-07T04:24:01.424Z"
    },
    {
      "slug": "tank-stocking",
      "url": "https://fastaquatics.com/calc/tank-stocking/",
      "title": "Aquarium Tank Stocking Calculator",
      "description": "Free tank stocking calculator. Enter tank size + species + adult length, get stocking percentage and recommended adjustments. Adapted from the 1-inch-per-gallon rule, weighted by species adult size, bio-load, and territory needs.",
      "last_modified": "2026-05-07T02:29:42.600Z"
    },
    {
      "slug": "tank-volume",
      "url": "https://fastaquatics.com/calc/tank-volume/",
      "title": "Aquarium Tank Volume Calculator",
      "description": "Free aquarium volume calculator. Enter tank dimensions in inches or centimeters and get gallons + liters. Works for rectangular, bowfront, cube, and cylinder tanks.",
      "last_modified": "2026-05-07T04:24:01.418Z"
    },
    {
      "slug": "tank-weight",
      "url": "https://fastaquatics.com/calc/tank-weight/",
      "title": "Aquarium Tank Weight Calculator",
      "description": "Free aquarium weight calculator. Calculate the total weight of your filled tank (water + glass + rock + sand) and verify your floor can support it. Critical for tanks 75 gallons and up.",
      "last_modified": "2026-05-07T02:29:42.601Z"
    },
    {
      "slug": "uv-sterilizer-sizing",
      "url": "https://fastaquatics.com/calc/uv-sterilizer-sizing/",
      "title": "UV Sterilizer Sizing Calculator",
      "description": "Free UV sterilizer sizing calculator. Enter tank volume + flow rate + target purpose (clarity, parasites, bacteria) and get the recommended UV wattage + GPH range.",
      "last_modified": "2026-05-07T05:48:06.696Z"
    },
    {
      "slug": "water-change",
      "url": "https://fastaquatics.com/calc/water-change/",
      "title": "Aquarium Water Change Calculator",
      "description": "Free water change calculator. Enter tank size + nitrate reading + target nitrate, get the water change percentage and frequency to maintain target. Works for freshwater + saltwater + reef.",
      "last_modified": "2026-05-07T02:29:42.601Z"
    }
  ],
  "license": "CC-BY 4.0",
  "attribution": "Fast Aquatics (https://fastaquatics.com)"
}