Its not stocked atm, it currently has 2 mollies and a plec. I'm in the process of cycling and I've lost a couple fish, plus the water is cloudy and its starting to smell slightly. I've been doing pwcs every couple of days. I'm not going to buy any more fish until cycling is complete. Or at least progressed more than it has presently.
I'm not sure if my current set up is filtering well enough or oxygenating the tank, hence looking at a 2 in 1 solution.