nano-tech bio spheres

I run a bag of Maxspect Nano-tech Bio-spheres in my sump - Important to keep these clean, ideally these would be in my return pump chamber but i'm pushed for space - Any reason not to have them in a fluidised reactor fed from my return pump? I know they need to be kept packed tight to prevent...

I was wondering if anyone has any reviews of the MaxSpect Nano-Tech Bio-Spheres and blocks? I removed Marine Pier from my tank because I have noticed the Aluminium increasing on my ICP tests. I know we don't know what form it is but not worth the risk in my opinion. I am looking for a...