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Aluminum silicate is a different material with different properties than aluminum oxide (which I tested), but still will dissolve to some extent, just as aluminum oxide does. That said, I've not tested MarinePure, but others with it in their tanks have detected elevated aluminum.
I'm not saying folks cannot use aluminum oxide or aluminum silicate products and have fine tanks.
What I am saying is that aluminum oxide is a source of aluminum, and if you have elevated aluminum or things that have been attributed to aluminum, such as closed leather corals, you might look to aluminum oxide products as a source. I'd also suggest that when you have alternatives, selecting a non-aluminum material may be a better option.![]()
It was this information that helped me decide on this. However I don't believe this should be a complete stopping point for the use of it or testing it. The factors have shown it to be in correlation with these blocks however there is to many variables to list it as a cause or completely condemn. Nobody knows certain factors regarding these tanks and maybe we should setup a study to see if different variables along with this pure block would cause it to leech or if it's leeching at all.

Wouldnt a dense 4in thick, old school foam filter block do the same thing? Most people stopped useing foam because they were considered to be a nitrate factory. If they were dense enough wouldnt they remove nitrates, like the blocks do?
What was those guys response ???
What is the problem they have with LPS and Softies ? What corals you have in your tank ?

