Colombo GH+

Colombo GH+ is a concentrated liquid supplement that increases general hardness in aquariums where the source water is naturally soft or where RO water is used. It supplies calcium and magnesium in an easily absorbed ionic form, restoring the electrolyte balance essential for fish osmoregulation, plant nutrient uptake, and invertebrate shell formation.

Many popular aquarium fish such as livebearers, most cichlids, and goldfish require moderate GH levels to thrive. GH+ allows aquarists using soft source water to dial in precise hardness levels without guesswork. The liquid format is easy to dose and mixes rapidly into the water column.

Colombo GH+ does not affect KH or pH, giving independent control over each parameter.