here is the recipe i use:
Materials:
ââ"šÂ¬Ã‚¢ 4 Bags Play Sand ââ"šÂ¬Ã¢â‚¬Å“ It has to be ââ"šÂ¬Ã…"œPlay Sandââ"šÂ¬Ã‚Â
ââ"šÂ¬Ã‚¢ 1 Bag of #3 Portland Cement
ââ"šÂ¬Ã‚¢ 1 Bag of Shells/Dead Coral
ââ"šÂ¬Ã‚¢ 3 Normal Sized Rubbermaid Totes
ââ"šÂ¬Ã‚¢ 2 Small Sized Rubbermaid Totes
ââ"šÂ¬Ã‚¢ 1 Garden Shovel
ââ"šÂ¬Ã‚¢ 1 Large Cooking Spoon
ââ"šÂ¬Ã‚¢ 1 Small Heater ââ"šÂ¬Ã¢â‚¬Å“ Up to 30 Gallons
ââ"šÂ¬Ã‚¢ Screen
ââ"šÂ¬Ã‚¢ Fresh Saltwater
ââ"šÂ¬Ã‚¢ 1 Strong Power Head
ââ"šÂ¬Ã‚¢ 1 Small Filter ââ"šÂ¬Ã¢â‚¬Å“ Up to 30 Gallons
ââ"šÂ¬Ã‚¢ 1 Reef Light and Fixture
ââ"šÂ¬Ã‚¢ Fresh Water
Instructions:
1. Fill the 1st normal sized tote Ã"šÃ‚¾ full with aragonite sand.
2. Mix 4 cups Play Sand with 7 cups Portland cement, 8 cups clean freshwater, and 12 cups of the shells/dead coral, in the 1st small tote, using the spoon, until semi-thick. Try to keep mixture as dry as possible.
3. Wet the sand so it is damp not soaked.
4. Dig out a mold that you want (Cave, Cup, Arch, etc.) in the aragonite. Be careful not to expose the bottom of the tote or the rock will have an unnatural flat spot.
5. Fill the mold with the new mix of. Use the garden shovel to do this.
6. Cover the rock with sand. Make a very natural looking rock by using different sand on the top of the rock.
7. Tap on the side of the tote about 20 times. This will settle the sand into the mix.
8. Let the mix set for 24-36 hours before you take rocks out. Keep at room temperature so they dry in 24 hours.
9. Rinse the rock in fresh water to clear any loose sand off of the rock.
10. Fill a smaller tote half full with white vinegar. Soak the rocks in the vinegar for 12-24 hours so they can cure.
11. Soak in freshwater for 2-3 days. Do small water changes every day.
12. Remove the rocks.
13. Fill the 2nd normal sized tote with fresh saltwater.
14. Place in saltwater for 1-2 days. Run tests for high PH, Nitrite, Nitrate, Ammonia, etc...
15. If tests are normal your rock is now ready for use.
CREATING DIY LIVE ROCK (A piece with some sort of life)
1. Fill the 3rd normal sized tote with fresh Saltwater.
2. Put the small heater, the power head and small filter in place on the tote.
3. Place the rocks in.
4. Treat the water with extra SeaChem Reef Builder and Reef Calcium to start the coralline algae.
5. Cover the top of the tote with the screen. Secure the screen tightly so it will not bend inward. Place light on top of screen.
6. Turn light on/off like any regular aquarium light.
7. Use a Copper Band Butterfly or Peppermint Shrimp and Reef Janitors in the live rock system to control Aptasia and unwanted algae.
8. After the rock starts to grow coralline algae you can glue small frags to the rock with super glue gel.
9. You may know put the rock in your main tank or you may allow the live rock to finish growing. Around 2 months total.