You were inspired and follow the method (use canister filter) of your not idol Peter Wilkens with "GREAT EFFECT"NOT DOING anything Detrimental. They are used with GREAT EFFECT and reef pioneer Peter Wilkens used them also SO as I was inspired by him, So be it . To Each his own. They do the same thing as Media reactors Tons of space for media. I have NEVER had a problem with NITRATES or PHOSPHATES, Knowledge an Husbandry being the Key. It Works! LOL!!!