How Sand Filtration Systems Work: A Detailed Guide -PART 1

Hello Everyone!
Always wonder what is the used of the sand filter? In this video we will show you the internal parts of the sand filter so that you can have a better understanding of the mechanisms.
PS: We conduct monthly courses for those interested in mud crab aquaculture! Do drop us a PM for more info!
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[@michaelbryantucio]

Hi, is there a refund policy or a limited trial for your mudcrab and shrimp course? I already have knowledge with the ras setup and bioflo and I am just trying to enhance my knowledge. I qm just hesitant as the course is quite on the pricy side, and what advance knowledge I will get aside from the basic omes.