RO/DI & Saltwater

Don't want to setup an RO/DI system or deal with messy salt mixes at home or don't have the space? no problem, we have the solution. Collection from the shop available.

RO/DI Water – 0 TDS

£1.00

High-purity RO/DI water, produced using reverse osmosis and deionisation to achieve 0 TDS.

Ideal for marine and reef aquariums where clean, contaminant-free water is essential.

Perfect for:

Aquarium top-ups to replace evaporated water
Mixing your own saltwater
Water changes when combined with marine salt
Reef and marine aquarium maintenance

Using RO/DI water helps minimise unwanted substances such as phosphates, silicates, nitrates and other impurities commonly found in untreated tap water.

TDS: 0 ppm
Suitable for: Marine & reef aquariums

Important: RO/DI water contains no salt or minerals. For water changes in a marine aquarium, marine salt must be mixed into the water before use

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Ready-Mixed Saltwater – ATI Absolute Ocean

£1.50

Premium ready-to-use saltwater, prepared using our 0 TDS RO/DI water and ATI Absolute Ocean seawater concentrate.

Mixed in-store to a specific gravity of 1.025, making it ideal for routine water changes, new aquarium setups and marine or reef aquarium maintenance.

ATI Absolute Ocean is formulated from pharmaceutical and analytically pure salts to closely replicate the major, minor and trace element composition of natural seawater.

Typical Water Parameters

Salinity: 1.025 SG
Alkalinity (KH): ~7.5 dKH
Calcium (Ca): ~421 mg/L
Magnesium (Mg): ~1,313 mg/L
Potassium (K): ~408 mg/L
pH: ~8.2
Strontium: ~8.1 mg/L
Iodine: ~70 µg/L

Ideal For

Regular marine and reef aquarium water changes
Emergency water changes
New aquarium setups
Customers who do not want to mix and measure their own saltwater
Transporting or acclimating marine livestock where prepared seawater is required

Simply collect the quantity you require and the water is mixed and ready for use.

Mixed with: ATI Absolute Ocean
Base water: 0 TDS RO/DI
Specific Gravity: 1.025

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