04-13-2009, 11:00 AM
| || | What is this for?
Hello, I am just starting out on my first saltwater tank and I have a few questions. I was wondering if I would need an external water pump, and if so, why? What does it do? Also, do I need an air pump? FYI im looking into doing a 10, 20 or 30 gallon tank, not sure what size yet. Thanks!