What are requirements needed for saltwater fish?
To keep saltwater fish, you should have a fairly large aquarium, preferably with a canister or trickle filter(for fish only). You need marine aquarium salt and a hydrometers (salt measurer). You will also need marine substrate (gravel) made from aragonite (crushed coral), and not a gravel designed for freshwater. Depending on your water source, you may also need a water purification system, and of course you will need a heater. If you want to get a really detailed answers, call the experts at www.bigalsonline.
