-> My Algae Scrubber, running FULL TILT on making Macro had no Impact on Lowering Trace Elements (1 Week after Water change)
-----------> This means I can Scrub All I want with my Current Weekly Water change and no worries about adding anything.
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It does have an impact on elements, but if you are doing water changes you are replenishing them! The problem comes from NOT doing water changes, or not doing enough water changes, with Chaeto.
It's biology -- chaeto uptakes trace elements, specifically metals (unfortunately not the ones you're trying to get rid of!)
So unless you plan to do zero water changes, you won't have to worry about chaeto eating up any elements
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