I knew two brands.
One is the most commonly used Tom and the other one is Cosmo.
I think that most shops are selling Cosmo at a higher price. Only C328 is selling Cosmo at a much lower price.
Anyway for skimmer,the brands do not really matter. It is because both work the same. The most important thing is your filter cause that is the once that actually remove the proteins.... The skimmer only provides the openings. That's all.
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