Placement
Since you probably already have a system set up, placement is the first consideration. To be most effectively used, a protein skimmer should be the first step in your filtration process. If you have a wet/dry filter, getting an in-sump skimmer will be the easiest and most cost effective. If your sump does not allow that much space, an external model that sits next to the sump is best. This type is out of sight, has a lower likelihood of being bumped, and may be able to use excess flow from the return pump to run it. If you do not have a wet/dry filter, then either an internal or external hang-on-the-tank model will work depending on how much space you have behind your aquarium or how much space you are willing to give up within your aquarium.
Maintenance
How much time you want to spend maintaining your skimmer is an important factor in choosing the right skimmer for you. The larger the collection cup, the less often you have to empty it. If it has a built-in drain, you can hook up a gallon container and empty it even less often. Either way, it must always be emptied. An overflow not only can contaminate your water, but can also give off odors.
A counter current system has higher maintenance since the airstone must be replaced frequently. When selecting any protein skimmer, examine the design to determine how easily it will be to access the components that may need replacement (e.g., airstone) or cleaning (e.g., Venturi valve).
Cost
A protein skimmer's efficiency depends on the amount of crash (how hard the bubbles are forced into the water) and dwell time (the amount of time the bubbles spend in the chamber). Usually, the more expensive skimmers are more efficient and are easier to set up and adjust. So, it is always a wise idea to get the best one you can afford. All skimmers require cleaning to work their best. No matter what skimmer you choose, its efficiency will decrease if not properly maintained. When choosing a skimmer, do not skimp; selecting one that is slightly larger than necessary is better than choosing one that is too small.
Ozonizer
You also need to decide if you want to use ozone. An ozonizer produces ozone which can:
- Destroy disease-causing organisms
- Raise the pH
- Increase the dissolved oxygen in the water
- Increase the efficiency of a protein skimmer
The ozone is best added to the water via a protein skimmer which can deliver it in very fine bubbles. An ozonizer will need to be either manually controlled by you, or as we recommend, by an electronic controller. Not all protein skimmers can be used with an ozonizer, so be sure to check. Also remember to use ozone-resistant tubing and a quality check valve. Excess ozone is dangerous to fish, pets, and humans so if you plan on using it, use it responsibly.
