Sand type for tank upgrade

ManyBlenny

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I have a hector goby that loves to sift the fine grain sand I have in my current tank. I was thinking of upgrading to a 6 foot shallow LPS tank so the flow pattern will be different and I wasn't sure if I get fine grain again if it will just blow everywhere, but I'm also worried that the special grade size will be too big for the goby that has a pretty small mouth.

Would this scenario be resolved if I mixed sand so put special grade at the two tank edges where a gyre would most likely have the most flow, and fill the rest with fine sand like fiji?
 

flashsmith

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If you try to mix the sand the smaller particles will just end up on the bottom eventually. Been there it didn't work out like I had hoped. I run fiji in my high flow 180. It never blows around although I had to play with flow to get it just right. I use gyre pumps so it's much easier to adjust the flow where I want it compared to a fixed wave maker just to pushing water on one direction.
 
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