CUZ
New member
I pm'd him about it earlier and this was his reply...
Yup just portland cement, make sure not to get any of the "quick dry" types as the chemical used in them is no good for a reef tank.
I tried adding sand to the mix but found the plugs came out brittle, also tried just putting a top layer of sand on the wet plugs but didn't really like that to much either.
I basically mixed up the portland, lay down a garbage bag and start "splattin' small balls of cement onto it.
Usually do a variety of sizes.
Easiest way is do do a hundred or so at a time just to make the curing time worth while. I put them into a 5g pail once dry and change the water daily, after 7-8 weeks you should see the ph drop as they cure.
lol I guess pm stands for "public message"