Coral Hind May 20, 2010 Share May 20, 2010 Good info Jon. I have been thinking of setting up my next system the same way. Instead of live rock I will be using ceramic blocks in the sump. Link to comment Share on other sites More sharing options...
zygote2k May 20, 2010 Share May 20, 2010 http://us.ebid.net/for-sale/1-lb-black-concrete-cement-color-dye-colorant-8562268.htm just got to figure out if its ref safe This is what I've used in the past to make black concrete for FW ponds. I don't know if it's toxic though- the ponds were several hundred thousand gallons and we used the concrete around the coping. Link to comment Share on other sites More sharing options...
gmubeach May 20, 2010 Author Share May 20, 2010 hmmm I may have to do a test batch does anyone have the basic formula for making reef rock? Link to comment Share on other sites More sharing options...
Coral Hind May 20, 2010 Share May 20, 2010 4 parts cc/sand to one part portland cement. Link to comment Share on other sites More sharing options...
Shadowbearwv May 20, 2010 Share May 20, 2010 From most of the reading I've done. You can use sand as a mold. Could you just use black sand for that and keep what sticks? Tony Link to comment Share on other sites More sharing options...
Coral Hind May 20, 2010 Share May 20, 2010 GARF.org has some great video and instructions on how to make your own rock. Link to comment Share on other sites More sharing options...
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