ANSWERS PLEASE! How I can choose between the rocks in my aquarium? PLEASE HELP?

I have a gallon saltwater tank with a chip 20 stars sea of chocolate, two false percula, and a pygmy angel. I need some more rock for decorations, and I have 10 pounds of live rock. restricts the money owed, I am not able to buy the rock, but could afford to be about 10 kilos of base rock, or should I buy some lava rocks and glue together. DIY decorating ideas? What rocks are safe … I think anyone who pass the test of vinegar? All help is appreciated, thanks in advance! http://www.flickr.com/photos/41437317 @ N06/3837874797 / theres a photo of what appears now

Honestly, I would be doing a disservice to the fish to move more water, decorated and rocks. You must remember that we are working with 20 gallons of water more in the moment to add your 10 pounds of live rock and sand bed is probably looking a little more than half. 10 pounds of live rock is certainly enough for the tank size. I recommend you let the rest of the fish room to swim, despite the impulse to decorate your aquarium is pulling you – I understand the need, but saltwater tanks require more space for waste dilution and bathroom.

setting up a African Cichlids Lake Malawi Lava Rock Tank