Second-hand technical aquarium equipment: filters (internal, external, sump), heaters, LED lighting and fixtures, pumps, skimmers, CO₂ systems, RO units… Buying new is expensive: pick up aquarium gear as a gift, swap or sale between individuals near you. Aquapotarium connects aquarists, with no middleman or commission. Remember to check that the equipment works properly and is compatible with your tank's volume before buying.