I have a 37 gallon tank currently occupied by a pair of bala sharks and an angelfish. They are not fully grown yet so its okay. There are also some tetras in it. I plan on upgrading the tank to a larger aquarium. I will have a spair 37 gallon tank and am wondering what I should put in it. Im willing to go to saltwater but im worried about if it would be harder to maintain than freshwater. Any cool ideas for the spair 37 gallon aquarium. my budget is $1500 dollars.







