Free bioload calculator

Is your tank one hidden problem away from crashing?

A dead fish tucked behind a rock or an overfed tank can spike ammonia before you ever see cloudy water. Check your real bioload now, so you know before your tank does.

Check my tank now

Free calculator below. Takes about 30 seconds.

How much AquaChar®️ does your tank need?

Tell us about your tank and everything living in it. We'll estimate your bioload, how much AquaChar®️ to use, how often to swap it out, and what your livestock is worth.

Tank size
Water type
Anything else

Add animals not listed above, like an axolotl, a turtle, or a clam.

How often you feed
Live plants
Water changes

These results are estimates based on typical conditions. Livestock prices start at typical retail amounts; change them to what you paid. Replace AquaChar®️ sooner if you see cloudy water, odors, or rising ammonia or nitrite readings, and always follow the directions on your package.

No chemicals. No shortcuts. Just nature. Perfected.

★ ★ ★ ★ ★
Loved by aquarium experts, hobbyists, and families across the U.S.
"You can achieve outstanding water clarity with so many more benefits"

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AquaChar™ 1 Cup (250ml), Forged Carbon Water Filter for Aquariums, Hydroponics, and Ponds

$64 USD
$79 USD $64 USD
Sale Sold out
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Best-in-Class Usage Guide (1-Cup or 250ml)

  • Perfect for:

    • Aquariums (up to 40 gallons)
    • Ponds, hydroponics, aquaponics
    • Safe for all species

  • Instructions:

    • Rinse gently before use
    • Place in mesh bag in high-flow zone
    • Leave for up to 3 to 6 months
    • When replacing old Aquachar, Please leave the old AquaChar in the tank alongside the new one for one month. Then remove the old piece—this allows healthy bacteria to acclimate to the new material.
    • Repurpose in garden or compost
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See What You're Really Paying For

Water Need Traditional Method Typical Cost AquaChar Replacement
pH Stability API pH Adjusters $10-$15 ✓ Intelligent pH Buffering
Water Clarity Accu-Clear or Pads $10-$20 ✓ Micro-particle Clarity
Toxin Filtration Activated Carbon $20-$30 ✓ Selective Carbon Filtration
Microbial Health Bacteria Boosters $15-$25 ✓ Natural Bacteria Growth
Algae Control UV Sterilizer/Chemicals $10-$50+ ✓ Bacterial Balance Reduces Algae

What you get with AquaChar

  • Cleaner Water, Naturally

    See visibly clearer water within days—no chemical additives, no stress.

  • Healthier, Happier Fish and Plants

    Keeps good bacteria alive, balances pH, and creates a stable ecosystem

    your aquatic life will thrive in.

  • Less Maintenance, More Peace of Mind

    Works for up to 3 months. No more guessing, no more cartridges. And when you're done?

    Toss it in the garden.

  • Grows Beneficial Bacteria, Reduces Algae Naturally

    • Creates microhabitats that supercharge biological filtration
    • Supports nitrifying and decomposing bacteria, reducing ammonia and nitrites

    ➤ Less algae. More balance. Healthier water.

  • 100% Natural—No Microplastics, No Chemicals

    • Unlike synthetic filter media, AquaChar is made with zero polymers, coatings, or binders
    • Safe for all aquatic life, including shrimp, plants, corals, and fry

    ➤ Clean Healthy water without hidden toxins

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