Reactors are specialised filtration units that push aquarium water through a chamber of media, making them far more efficient than simply placing media in a bag in your sump. They’re commonly used for carbon, phosphate remover, bio-pellets, calcium/alkalinity media or macroalgae, helping to polish the water, reduce nutrients and stabilise key parameters. By controlling flow through the reactor, you can fine-tune how hard the media works, making them ideal for reef tanks that need low phosphate, crystal-clear water or consistent calcium and alkalinity. A well-set-up reactor system adds a big boost to your overall filtration and keeps maintenance more predictable.
