Quantum Tank · free with your Quantum account

Your tests, your levels and your doses, in one place.

Most of us keep test results in a notebook and work out doses in our heads.

Quantum Tank keeps every result, shows each level against the manufacturer’s target, and works out your Quantum doses for your tank size.

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Display reef

Mixed reef · 75 gal

Example
AlkalinitydKH
8.2
Quantum 7.4–10.5
Calciumppm
430
Quantum 405–440
Magnesiumppm
1290
Quantum 1230–1310
NitrateA bit high
2.3ppm
Quantum 0.1–2
Test due todayWater change due Fri

Example readings. The blue band is Quantum’s target range. A level that drifts out turns yellow, then red.

What you get

1

Your tanks

Saltwater or freshwater, up to 5 tanks. Size, stocking level and the Quantum products you use.

2

Test log and charts

Log alkalinity, calcium, magnesium, nitrate, phosphate, pH, salinity and more. Each one is charted over time against its target range.

3

Dose calculator

Pick a product and get the amount for your tank. The numbers come from Quantum Aqua’s own dosing formulas.

4

Bottle countdown

Add the bottles you’ve opened and see roughly how many days each one has left.

A heads-up before you run out

Join the Quantum Tank email list from inside the app. When a bottle has about 14 days left, we email you with 8% off your next one.

Keep testing week after week and we send another 8% off as a thank-you.

Start in three steps

  1. Create your free account on quantumusa.us.
  2. Set up your tank: size, type and the products you use.
  3. Log your first test. Your levels show up right away.
Create your free account

Already have one? Log in

Good to know

Is it free? Yes. All you need is a free quantumusa.us account.

Do I download anything? No. It runs in your phone’s browser, and you can save it to your home screen.

Saltwater or freshwater? Both.