I'm researching filtration options for my aquarium. Can you summarize the main characteristics of the 'Hamburger Matten Filter' (HMF) based on the article 'The HMF – What’s That?' on seriouslyfish.com? Specifically, describe its key advantages, how it's generally set up, and its perceived popularity outside mainland Europe.
Navigate to 'seriouslyfish.com'. Click on the 'Knowledge Base' link. Click on the 'Beginner's Guide' link. Click on the article titled 'The HMF – What’s That?'. Read the article to identify its main advantages, general setup information, and perceived popularity outside mainland Europe. Summarize these key points.
State that the HMF is a cheap filtration method. Mention that it is favored by breeders and hobbyists with a large number of tanks. Confirm that the article concentrates on the general set-up of the HMF and how to build one, potentially mentioning components like filter foam and a pump. State that the article notes the HMF is 'apparently not all that well known outside mainland Europe'.