Originally Posted by Tomchong22
What you need is . Portland cement,rock salt, and crushed coral... Pea gravel... Etc, the mix is 2 part rock( your gravel or whatever 1 part cement. Mix this together then add water. Just enough so you have a dry chunky like oat meal mix. Then mix in 3 parts rock salt.. In a large tub fill it with sand to make your mold. Pour the mixture into the mold and cover with a fine layer of sand. After 48 hours remove the rocks and let air dry for another 24 hours. Take all your rocks and place them in large bins full of water . For the next 3 weeks you will need to change the water every other day. On your last week add half water and half vinegar solution to the water that the rocks will sit in. This will neutralize the lime in the cement. Rinse the rocks then let them sit in fresh water for about 2 days every three days you will want to test your ph. Once the ph of the water reaches whatever you tap water is they are safe to put in. I made about 70 lbs of base rock or about $30... Way cheaper then the $7 a lb for live rock. And plus it will all become live in time.
Very good information. This will sure save me a lot of money!
What is the "etcetera" part? What else can I use?
How do you make a mold using sand?
What's the rock salt for?
This process will take a little over a month but will be just in time for me to complete all I need for this setup. Thanks.