Here's my take on skimmers HTH
Here's my take on skimmers HTH
Hope this helps in making your decision.-this is my saved doc on the subject.
In many ways, protein skimmers are a lot like automobiles. Some people lust after a two door sportscar, while others might desire a four-wheel drive truck. Although neither automobile is quantitatively better than the other, each fills the needs of a different type of driver best. The fact is, there simply is no such thing as a "best" skimmer.
Protein skimmers benefit water quality by facilitating two major processes - gas exchange and export of organic wastes.
In short, the four main factors which govern a protein skimmer's effectiveness are…
1. Bubble size
2. Bubble quantity
3. Overall flow-thru rate
4. Quality of contact time
First two simple
Last two not so simple.
The overall flow-thru rate and quality of contact time are not as clear cut as the previous two measures. Some have reported that high flow-thru rates (several hundred gallons per hour) yield the best results. Others argue that a slow, leisurely flow-thru rate facilitates the best skimming. Most likely, both schools of thought are correct in their own way. The actual chemistry behind the mechanism of protein skimming tells us that, in order to remove the maximum amount of waste possible per bubble, we want a very, very slow flow-thru rate. This makes perfect sense… If the flow-thru rate is slow, each individual air bubble can react with the water for a longer period of time. Air bubbles, after all, don't become saturated with proteins immediately.
The better needle-wheel skimmers on the market are notorious for building a dense, milky froth. This makes for efficient skimming in a relatively compact package. As a result, this type of skimmer is extremely popular, with new designs popping up every month or two. Although the air and water flow rates in these skimmers are high, they still fall short of the air-induction style skimmer
Downdraft skimmers feature high flow-thru rates. They also inject large amounts of air into the water.
A typical downdraft skimmer can cycle the entire volume of a 100 gallon system several times an hour. This makes for excellent oxygenation and ensures that all of the water is treated in a short amount of time.Although this design works well, it is not without its disadvantages. These skimmers are notorious for being large… many models stand several feet tall. They also require a very strong pump to run correctly, in many cases a pump which is expensive and energy-thirsty.
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