The gunk that collects agaist the sides of your skimmer neck must be cleaned as soon as it starts to become visible. If not, ammonification will begin there and ammonia will return into the water column with water running down the inside of the skimmer neck. This obviously applies to the gunk on the lid as well.
This ammonia will not be skimmed out later as it does not adhere to air bubbles. Here's an explanation why: Protein skimmer - Wikipedia, the free encyclopedia
| Protein skimmer - Wikipedia, the free encyclopedia |
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Protein skimmer - Wikipedia, the free encyclopedia |