Rotating the regulator in the “Minus” direction lowers the foaming point in the neck to produce a drier foam.
Tip: Production of an excessive amount of weak, watery foam is also referred to as over-skimming. This often indicates the presence of chemical substances that need to be removed by the skimmer. Many water conditioners/impurities found in natural seawater increase the surface tension of the water and cause serious over-skimming.
Tip: If you are using natural seawater, you should be aware that most seawater today contains traces of pollutants, e.g. phenols, carbohydrates, oils, etc.
Therefore, natural seawater is not recommended for use in reef aquaria. We strongly recommend NOT using tap water. If you intend to use it, however, DO NOT add conditioners/de-chlorinators. Instead, allow the water to settle for 24 hours for the chlorine to evaporate naturally before introducing it to the aquarium.
Tip: Some brands of synthetic salt contain binding substances, such as EDTA, that increases surface tension and causes over-skimming.
TIP: In the event of the collection cup overflowing due to over skimming simply open the collection cup drain hose valve and allow the water (wet skimate) to flow back into the sump until foam production becomes stable. Remember to close the valve once foam production is stabilized.