I live near about an hour's drive away from the Gulf of Mexico. Because of this I was thinking of using the sand from the beaches and the water from the gulf for my aquarium. The beach sand is not calcium based, and I was wondering if this would be a problem in maintaining pH. Also, water around Texas does not compare to water in FijI or any other place due to industrial plants, but the water isn't poisonous. It's just not as clean. I plant to raise damselfish, no more than 5. Is using sand from the beach and water from the gulf okay? I will have a 55 gallon aquarium.