Well to be fair if you think about filtration and what is really is mechanical biological and chemical they have to be in this order i wont go into methods like absorption materials like zeolite as that's grander scale stuff but stick to the mechanical so scrubbing the water clean of debris then clean water hitting bio media also the water is a a slower rate as contact is also important so the bacteria can have lunch then if required chemical ,,,i use this very successfully in ponds tanks and aquaponic systems for a very long time ,,,its actually cool science lol

Thanks for the kind words and totally agree suppliers of aquarium goods need to do better

Glad it was helpful!

Thank you i will say that it has its issues but will be looking at more sub 100 units ty for the comment fella