Reef Tank Parameter Tracker

Keeping a reef tank stable is mostly about consistency, not heroics. The corals and inverts that make a reef worth keeping respond far more to stable, in-range chemistry than to any single "perfect" number. ReefParams is a free, no-account tracker that lets you log every test and instantly see whether your tank is drifting.

Why tracking matters

Alkalinity can swing a full point in a day if your dosing is off; calcium and magnesium quietly deplete as corals grow; nitrate and phosphate creep up with feeding. A spreadsheet works, but it won't warn you. ReefParams shows the last value for each parameter, an up/down arrow versus your previous test, and highlights anything outside the common reef-safe range in a warning color so problems are obvious before they cost you a coral.

Common reef-safe ranges

These are starting points; SPS-dominant tanks often run tighter, while a softie or fish-only system tolerates wider swings. The goal is stability within a range you choose, and ReefParams makes that drift visible at a glance.