• Raises GH by a known amount per dose - 5 mL per 40 L lifts GH by 1 meq/L (2.8 dGH), so you can dose to a target rather than guessing.
• Calcium and magnesium based - a blend of divalent salts, not a single mineral.
• Suits hard-water species without overshooting soft-water ones - dose it into new water rather than the display tank, so you control exactly how much a water change changes hardness by.
• Costs low cents per litre - see Cost per litre below, and the 350 mL is the cheaper of the two sizes per litre dosed.

Seachem does not publish an itemised ingredient declaration for mineralize beyond describing it as a blend of divalent salts - we've stated what's published and no more.

Test your water's GH before dosing. If you don't know where you're starting from, you can't dose to a target.

Add 5 mL per 40 L (10 US gallons) to new water when setting up a tank or doing a water change, then dose weekly, or as needed, to maintain the target hardness. Each 5 mL dose raises GH by 1 meq/L (2.8 dGH) in that volume.

The 350 mL is the genuinely cheaper size here - about a quarter less per litre dosed than the 150 mL, on top of needing fewer bottle changes.

Suitable for: freshwater planted aquariums where GH needs raising for hard-water species, and RO or very soft tap water setups that need mineral content added back in.

Not suitable for: soft-water and blackwater species that need GH kept low - dosing this into a Cryptocoryne or Amazonian blackwater tank works against what those plants and fish want.

Test GH periodically rather than dosing on a fixed schedule indefinitely - once a tank reaches its target hardness, ongoing dosing needs are usually much lighter than the initial set-up dose.

• aquavitro synthesis - macro and micro-nutrient fertiliser for the same planted tank.
• aquavitro envy - vitamin, amino acid and fatty acid supplement for the same routine.

Seachem does not publish a separate warranty term for aquavitro liquid supplements. Your rights under the Australian Consumer Law apply regardless. Standard freight.

How do I know if I need this?

Test your tank's GH. If it's running soft for the plants you're keeping - RO water or naturally soft tap water is the usual cause - mineralize lifts it in known, measured steps rather than by guesswork.

Will it affect pH?

Seachem markets mineralize specifically as a general hardness supplement rather than a pH or KH buffer; check your KH and pH separately if you need to manage those too.

Can I use it in a shrimp tank?

Many freshwater shrimp benefit from moderate GH, but check your species' preferred range first - some, like caridina shrimp, want harder water; others want it soft. Dose to a tested target rather than a fixed schedule.

Which size is better value?

The 350 mL, on both counts - it works out cheaper per litre dosed than the 150 mL, and it's fewer bottles to buy over the same period of use.