ok substrate test inprogress.
<BLOCKQUOTE><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><HR>Originally posted by One_Divided:
the feedback I've gotten on it is that it may lead to silicates breaking down in the water and therefor more algea growth<HR></BLOCKQUOTE>
hey Adam I find the people that say this are old timers who don't know why they are getting algae and just blame it on the sand. Silica is glass particles and is insoluable in water. I was going to go witth sand blasting sand hence my "glass for a sandbed" post but all silica sand is sharp and not smoothed edges (if it was smooth it would be clear like glass) so that is why I started checking out the dolomite as it is calcium and IF there is any sharp edges it will be soft like calcium.
Steve
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