Case Studies

We know your problems, such as

Poor water quality

Add hard water, silica, too much nitrate, and evaporative water without increasing carbonate hardness (KH) and total hardness (GH) at the same time... In the vast majority of cases, the available drinking water is only suitable for hobbies to a limited extent.

The purest water

If water of the highest purity is required, ROWA® is the right choice for you. We have been producing reverse osmosis systems for small, medium, and large water requirements since 1987.

With our RO systems, we offer you various equipment for individual requirements and smart technology, such as our automatic filling system.

We make no compromises when it comes to quality: ROWA® housings are "Made in Germany"—and with our new bayonet fastenings, maintenance becomes child's play!

Algae in the aquarium

Green panes, cloudy water, brown deposits on the substrate and on decorations, ailing corals; these are widespread problems in aquariums - whether nano tanks or large aquariums, freshwater or saltwater systems.

Minimum factor phosphate

Take away what algae require for growth: phosphate and  silicate (diatoms). ROWAphos selectively removes both without affecting the overall water chemistry. Intensive research led us to the development of a patented production process:

ROWAphos is made from chemically pure raw materials at our factory in Osnabrück.

Our bestseller—worldwide!

Turbid water in the aquarium

Everything is beautiful, everything is new, and then what? The water in the aquarium is getting cloudy. Doesn't just a big partial water change help there? Not necessarily.

Crystal-clear water

Yellow matter and other organic compounds are bound by ROWAcarbon+ and removed from the water cycle. The water becomes crystal clear. By the way, ROWAcarbon+ also removes nettle toxins, other toxins and drug residues from the water.

You can also get crystal clear water by adding ROWAcrystal. This liquid medium binds the turbid substances, which are then removed from the water via the filter system.

New equipment

The aquarium is finally here. Now it's time to "break in" and wait until the residents can move in—for days...

The fish are happy about a lot of food, but what about the water quality? Suddenly, the fish are doing badly. Too much nitrite and nitrate...

Give the bacteria a head start

Invisible helpers for a stable nitrogen cycle right from the start: ROWAbac M contains particularly salt-tolerant nitrifiers (ammonia- and ammonium-degrading bacteria) and denitrifiers (nitrate-degrading bacteria), which significantly shorten the run-in phase and stabilize the biological balance. In this way, you avoid the accumulation of toxic nitrites and accelerate the breakdown of nitrates.

And the best thing is that the ROWAbac M bacteria don't just like salty food. They can also be used in fresh water without any problems.