“Anti-foaming system” in three steps:

After the improvement of the water parameters, the skimmer returns to the normal operating condition again.

Normal foam production: The foam rises constantly into the foam reactor; all water levels are ideal for a maximum skimming performance.

Overfoaming A: Due to the surface tension, the foam production increases; the water in the intermediate chamber rises; the water enters the compensation outlet and draws the air bubbles out of the foam reactor. Thus, the foam volume in the reactor reduces itself.

Overfoaming B: The foam production continues to rise, which also applies for the water level in the intermediate chamber, and then enters the air passage of the Hydrofoamer: The bubble production is stopped immediately; the foam production is reduced.

The models of the Master DOC Skimmer are easily placed in aquarium cabinets with variable level and need no adjustment for operation. They operate with TUNZE® Hydrofoamer 9400.04, which also ensures the water circulation; the open water circulation then reaches a water flow rate of 1,300 l/h (343 USgal./h), 2,600 l/h (686 USgal./h), 3,900 l/h (1,030 USgal./h) or 5,200 l/h (1,373 USgal./h) depending on model. The models 9420 / 9440 as well as 9460 / 9480 have the same technical features, only the number of Hydrofoamers varies. In case of operation in aquarium cabinets, the cartridge core on the outlet pipe ensures bubble-free outgoing water. Skimmer cup and foam reactor are one unit in all TUNZE® DOC skimmers: Every cleaning of the skimmer cup leads to the reactor being cleaned at the same time, and thus a very constant and efficient foam production is ensured. During the cleaning process, the Hydrofoamer remains operational and automatically flushes the air passage.
Delivery condition: Ready to mount; dimensions with the cleaning accessories.