Customer Reviews
Lewis
Machen
13/07/2026
Exactly what you want from activated carbon: it sits quietly in the sump, gets on with its job, and doesn’t ask for praise. The water looks clear, the tank smells fresh, and none of the fish have submitted a formal complaint.
Rock N Critters were excellent as usual—friendly, knowledgeable, and somehow able to make buying a tub of black granules feel like a worthwhile outing.
Would purchase invisible water improvement again.