Tools

Nitrate & phosphate ratio calculator

Compare nitrate (NO₃) and phosphate (PO₄) using trusted ratio targets for planted and reef systems.

Dial in dosing with quick ratio checks.

Presets

Choose your target ratio

Common nutrient ratios help balance growth and algae control.

Other tools

Try our other free tools!

Aquarium substrate calculator

Calculate substrate volume and bag count for sloped layouts.

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Aquarium volume calculator

Estimate tank capacity from length, width, and height.

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Browse all calculators

Explore volume, substrate, lighting, and dosing helpers.

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