My Favorite Currently
Posted: 7/28/2010 from MANCHESTER, NH UNITED STATES
I love this substrate and it's become my current favorite. I've used this on two systems so far and love the varied particulate grades and over all color. I have never experienced substrate hardening with this substrate. Substrate hardening is caused by other factors and can occur with any substrate.
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Posted: 12/20/2009 from LATHROP, CA UNITED STATES
Completely useless as a filter type refugium media as marketed. The product is mostly powder and when used DOES NOT ALLOW water flow or algae root to attach. It becomes cement. A waste of money for this application. If you want to fix driveway cracks consider this, if you want a refugium substrate consider other products - fancy label does not mean it works.
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