The h2o pump transfers water with the reservoir to the tank, and an overflow siphon brings new water from your tank and trickles it around the biospheres ahead of it collects back from the reservoir. We use affiliate back links and may acquire Fee if you purchase an product via https://aquarium-filter-guide-uae70124.anchor-blog.com/17286335/considerations-to-know-about-beginner-aquarium-checklist