A mechanical level detecting switch is placed under one of the tanks. Automatic replacing of the evaporated water eliminates fluctuations of the salt concentrate and provides stable osmotic conditions for the animals. Prefiltration compartment with filtration sponge. 2 Turboflotor 1000 protein skimmers, each followed by a trickle filter module. The water flows via overflow and safety inflow into the mechanical prefilter, where coarse sediment particles are removed.
Water flows next into the protein skimming module, where soluble organic waste is removed.
From the skimmer, the water flows into the trickling filter module. Bacteria form an active biofilm on the Bactoballs and oxidize ammonia to nitrate and then back into the aquarium with a recirculation pump. The nitrate reductor is filled via a bypass. Here bacteria reduce nitrate in the absence of oxygen to harmless nitrogen gas. With the Marin 500, existing tanks can be transformed into powerful seawater tanks without plumbing or passing connections through the glass.