O2plus 12000 Air Machine Iron The SP300 is designed for

The SP300 is designed for medium-large sized tanks

Calcium level in reef aquarium should be kept at around 430mg/l

The rate of flow is decided according to the max jet of the pump(immersible power filter) and the circulation equipment

step up flow

For aquariums 100-200 litres

O2plus 12000 Air Machine Iron The SP300 is designed forWith the design based upon the Aqua One indoor units these units are fantastically quiet during operation. Outlet size is 1 2". Each unit comes with a 10 gang splitter allowing multiple air stones to be run simultaneously. The diaphragms of these pumps are Japanese silicone rubber cartridges which offer excellent reliability and life expectancy. 02plus 4000 Output 2100 Litres Hour High volume, high pressure pond air pump Enables connection of up to 10