Could this be true?

I really really doubt it .

In my experience water changes are what keeps your critters happy and healthy. Most of the time those filters just become traps for detritus and are a time bomb waiting to go off. I wouldn't trust anything that advertised eliminating water changes.
wouldn't waste my $ :shake:
Chris
 
Ditto

If it sounds too good to be true, it probably is. I am tempted to think it does something right for that outrageous price, but I wouldn't trust it.
 
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