yea, i looked and looked, and a couple people on here pointed me in a couple really good directions, but it just didnt pan out for me to try ordering them online. the local feed stores around where i live didnt cary anything except crushed oyster shell in a 5lb bak for like $7. i said phooie on that...
i got a 40lb bag of crushed florida coral for 33 bucks, got my salt and the portland cement at home depot, and the forms were cardboard boxes and buckets, and an old kitchen sink i had laying around.
i figure, by the time i calculate in my time, and the water for the washout and cure cycles, and the materials, it ended up costing me about $1 per pound to make what could easily cost me $5per pound if i were to buy it at the LFS.
Not to mention that i got a really cool chemistry lesson, and then got to share that knowledge with a buddy of mine from out of town.(he helped me make the 130lbs of rock...
if you like, you can see a picture of what i made with my first batch in my tank in my showcase thread:
https://www.livingreefs.com/project5k-and-new-75gal-salt-tank-t19830.html look for the post: June 29th, 2009, 07:42 PM
the one rock in the farthest back right corner of the tank is the one i like the most... thats the one where i learned how to use the salt as my forms, so the surface texture is much more natural looking, than the others... Thats also what this entire batch looks like, only with the coral stuck to the surface...