Ocean Free Hydra Stream Inline Filter (Hydro-Pure Technology)



Take your aquarium filtration to a whole new level with revolutionary Hydro-Pure Technology from Ocean Free. 

These inline stream units are designed to be connected to your existing external filter, or run independently with a pump (not included).

  • Environmentally friendly, 
  • Low energy consumption, 
  • Chemical free process,
  • Multiple fittings provided for ease of installation (12/16mm and 16/22mm)
  • Suitable for a variety of setups including sump, inline, internal, ponds, trickle, 
  • Suitable for fresh and marine.


Stream 1: Flow rates: 300-2000L/hr, for tanks up to 1200L, Size: 25.5cm long x 7.5cm dia (excluding mounting bracket)

Stream 2: Flow rates: 800-3000L/hr, for tanks up to 2000L, Size: 29.5cm long x 7.5cm dia (excluding mounting bracket)

Stream 3: Flow rates: 1000-5000L/hr, for tanks up to 2500L, Size: 33cm long x 7.5cm dia (excluding mounting bracket)


About Hydro-Pure Technology

A team of scientists from Qian Hu and a local research company have scored a first by jointly developing the revolutionary Hydro-Pure technology that is capable of enhancing the natural filtration process in aquariums by as much as a few hundred percent when compared to conventional systems.

This energy efficient Hydro-Pure Technology is eco-friendly and truly the first of its kind in the world. It can also be applied to other areas in the ornamental fish industry as it promotes a natural, chemical free environment for all aquatic creatures.

The process not only provides a more efficient pathway for the degradation of aquarium waste, it also makes sure that the by-products are safe and the energy consumption is kept to a minimum.

The technique aims at the use of very low electric current to produce "OH-" reactive ions which quickly break up bio-loads into nitrogen gas, water and smaller organic and inorganic ions through oxidation. The process involved is not to be compared to other electrolysis techniques which use very high energy consumption; it is much less intrusive, simple and low cost.

The trick is in the specially formulated medium (Cata-Pure, replacement cartridges available) which catalyses the whole degradation process without the need of high current.

With Hydro-Pure Technology, coupled with natural bio-filtration, the water in the aquarium will be more stable and also more resistant to nutrient surges (eg Ammonia) which are detrimental to fish.

The effect of the technology is shown in improved water quality, healthier fish with more vibrant colour, faster growth as well as enhanced maturity.

This technology is currently the most innovative, environmentally friendly system available in the aquarium industry.