Maifan/Montmorillonite stone

Performance & sizing

Core numbers for matching this unit to your tank and electrical plan.

Power

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Flow rate

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Noise

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Dimensions

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Price range

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Tank fit (L)

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Consumables & maintenance

Follow the manufacturer schedule for seals, impellers, media, and other consumables.

Description

This row is held rather than finished, and the reason belongs on the page rather than in a changelog. The name covers two different materials. Montmorillonite is a defined mineral species, a clay. Maifan stone is a Chinese trade name for a rock rather than a mineral, and what arrives under that name varies with the supplier. One catalog entry naming both does not identify a single product, which is the same problem that has already removed rows from this catalog: a name matching more than one thing names none of them. The claimed function is the harder half. Stones like these are sold to release minerals into soft water, usually for dwarf shrimp. This catalog went looking for an authority that publishes a mineral requirement for ornamental dwarf shrimp on an earlier pass and again for this entry, and has not found one: no calcium figure, no calcium to magnesium ratio, no dosing rate, and no measured release rate for either material in an aquarium. The veterinary and fisheries reference works this catalog cites elsewhere cover fish nutrition and water chemistry and do not reach this, and the nearest fisheries manuals are about pond-farmed prawns rather than Neocaridina in a tank. So this page carries no numbers. Writing a dose or a hardness target here would mean inventing one, and a category page is precisely where an invented figure turns into a cited fact by being repeated. A keeper who wants to raise general hardness for shrimp is better served by a remineraliser with a published composition and a test kit, so the result is measured instead of assumed. The row stays because both materials are real things. It will graduate the day a source exists for what this one is supposed to do.