My son and I put together his 75gal tank today. We have a wet/dry filter, protein skimmer, and heater all set up. Tank is filled and filter and pump are working and no leaks. From here I plan to add a couple raw shrimp to start the cycle process. So my question is can I put down live sand at this point or do I wait. Also, since I am in sunny Florida, can I just go down to the beach, walk out a ways into the surf and get some sand? I know this is kind of a weird question, but I figured it would save me a ton of money. And since I am between coasts, which coast, if this is possible, would be better?