Step 1 Explained: Environmental Parameters™ for a Stable Reef

Introduction

There's no single set of perfect water parameters for every reef tank.

Many reef keepers assume higher alkalinity is always better for corals. The manufacturer's salt for SPS corals does the opposite.

It runs a relatively lower alkalinity. The Reef Essential® Aqua Care Guide™ says that helps reduce the white or "burnt tips" SPS corals can show in higher-alkalinity water.

That's the idea behind Step 1 – Environmental Parameters™. You start with the corals you want to keep, and your salt sets the numbers to match.

In this article, we break down what Step 1 covers, the targets for each reef type, and how to keep those numbers steady in your tank.

What Are Environmental Parameters in a Reef Tank?

Environmental Parameters is the first of the five steps in the Reef Essential system.

The Guide says many parameters affect the water chemistry of a reef aquarium, from major constituents down to minor and trace ones. Step 1 explains the core parameters and the levels that suit the type of reef you want to keep.

It starts with three major parameters, which the Guide groups as "TPS":

• Temperature (T): about 25 °C (77 °F).
• pH (P): 8.3–8.5.
• Specific gravity (S): 1.024–1.026.

Your salt then sets four more: calcium, alkalinity, magnesium and potassium. Those targets change with the corals you keep.

Why Your Salt Sets Your Reef Tank Parameters

The Guide says all of Quantum's salts are a hybrid of natural seawater and synthetic salt.

That combination captures the full array of elements in seawater, with the purity and consistency of a synthetic mix. The manufacturer says the salts' sodium chloride comes from natural seawater in South Australia, and that natural seawater contains over 70 elements.

The four Macro Probiotic salts also carry probiotics. The Guide says they help liven synthetic water by promoting the growth of beneficial bacteria.

From there, each Macro Probiotic salt is tuned for one type of tank. The Guide's advice is simple: choose your salt based on the corals you want to keep, and its parameters become your guide for the rest of your reef keeping.

That holds whether you're a beginner, an intermediate keeper or a professional.

The goal is not to push every number as high as it will go.

The goal is to match your water to the corals you keep, then hold it there.

Every bag of Quantum salt also ships with a batch-specific ICP report.

Reef Tank Parameters by Coral Type

All of the Guide's salt targets are given at 25 °C (77 °F). Here's what each salt is made for, and the numbers it aims for.

SPS Macro Probiotic Salt™

SPS (small polyp stony) corals, like Acropora and Montipora, often have more delicately structured skeletons.

This salt provides calcium, alkalinity, magnesium and potassium at levels close to natural seawater. Its targets are:

• S.G. 1.025: calcium 405 ppm, alkalinity 7.4 dKH, magnesium 1,230 ppm, potassium 375 ppm.
• S.G. 1.026: calcium 420 ppm, alkalinity 7.7 dKH, magnesium 1,280 ppm, potassium 390 ppm.

LPS Macro Probiotic Salt™

LPS (large polyp stony) corals, like brain, torch and plate corals, often have bigger polyps and more flesh-like bodies.

This salt is made with increased calcium, alkalinity, magnesium and potassium for LPS and soft coral tanks. The Guide says those higher levels can let the salt work as part of a dosing routine, which can reduce maintenance. Its targets are:

• S.G. 1.024: calcium 420 ppm, alkalinity 10.1 dKH, magnesium 1,255 ppm, potassium 385 ppm.
• S.G. 1.025: calcium 440 ppm, alkalinity 10.5 dKH, magnesium 1,310 ppm, potassium 400 ppm.

Mixed Macro Probiotic Salt™

This salt sits between the SPS and LPS salts. It's made for tanks that keep a wide mix of LPS, SPS and non-photosynthetic (NPS) corals, with parameters above natural seawater.

At S.G. 1.025, its targets are calcium 430 ppm, alkalinity 8 dKH, magnesium 1,295 ppm and potassium 390 ppm.

Mineral Sea Salt™

This is an authentic sea salt with elevated minerals and enhanced buffering capacity. It runs slightly higher than the Mixed salt and has no probiotics.

At S.G. 1.025, its targets are calcium 435 ppm, alkalinity 8.1 dKH, magnesium 1,305 ppm and potassium 395 ppm.

FOWLR Macro Probiotic Salt™

FOWLR means fish only with live rock: a tank with no corals. The Guide says these values are for FOWLR tanks only.

The salt is made with high calcium, alkalinity, magnesium and potassium relative to specific gravity, which helps pH and KH stability. Its targets run from calcium 350 ppm and alkalinity 8.4 dKH at S.G. 1.019 up to calcium 470 ppm and alkalinity 11.2 dKH at S.G. 1.025.

How to Measure Salinity With a Refractometer

The Guide measures salinity as specific gravity (S.G.), and names a refractometer as a common tool for testing it.

Calibration matters. The Guide says it compensates for variables tied to water density and temperature.

Here's the easier method the Guide gives:

• Set zero: use room-temperature RODI water to set the 1.000 S.G. point.
• Match the temperature: submerge only the prism in your aquarium water for 60 seconds, then note the S.G.
• Average it: repeat the submerging three times and take the average.

You can also use a standard calibrating solution. If you do, the Guide recommends bringing the prism and the solution to the temperature of your tank water, about 25 °C (77 °F).

What Causes Low pH in a Reef Tank?

The Guide names carbon dioxide build-up and alkalinity swings as the most common causes of a pH drop.

Both are likely when there's a lack of oxygen. The Guide lists overstocking, power outages and restricted flow as examples.

The Guide's Step 1 answer is pH Up. It raises pH temporarily, until the cause of the swings is under control.

The manufacturer also recommends getting to the source of the problem. Its list of possible causes includes too many fish, too little fresh air, not enough water flow and a lack of alkalinity.

How to Use Step 1 in Your Tank

Here's how to put Step 1 to work:

• Choose your reef type first. Pick the salt that matches the corals you plan to keep, and note its targets.
• Start here, even in an established tank. Your salt is the foundation for every other step, so know which salt you're on before you change anything else.
• Don't add livestock to an uncycled tank. The Guide warns this can cause new tank syndrome, where the bioload is too high and nutrient removal too low.
• Cycle after Step 1. Matching your major parameters to the levels you'll keep long term helps reduce bacterial die-off, which can restart the cycle. If your tank is already cycled, don't cycle it again.
• Follow the water change procedure for your salt. The Guide says every Quantum salt has one inside.
• Keep Step 1 running. Like every step except cycling, it's part of your routine for the life of the tank.

For the cycling process, read How to Cycle Your Aquarium Quickly and Efficiently. The free Aqua Care Guide has every Step 1 table, and the Environmental Parameters collection shows all five salts side by side.

When a product needs dosing, the free Quantum Aqua dosing app works out the amount from your tank's details.

Frequently Asked Questions

How Much Can You Raise pH in a Day?

The manufacturer's pH Up directions say not to raise pH by more than 0.2 in a day, and not to go beyond pH 8.5. Add smaller amounts, test, and adjust from the result.

What Does Probiotic Mean in a Reef Salt?

The probiotics in the Macro Probiotic salts promote the growth of beneficial bacteria. The manufacturer's salt pages say the salts also carry natural macrobiotics and vitamin precursors.

Can You Use Mineral Sea Salt™ in a Reef Tank?

Yes. The Guide lists it as a Step 1 reef salt, with parameters slightly above the Mixed salt. Without probiotics, it's more versatile: it can even be used in pools, spas and baths.

Does a Fish-Only Tank Need a Different Salt?

The Guide has a separate salt for fish only with live rock (FOWLR) tanks, with targets across S.G. 1.019–1.025. Those values are for FOWLR tanks only, not for tanks with corals.