seffieuk
I used to be indecisive but now I'm not so sure!
If it is as you say 500 litres, then its not powerful enough - if its 500 gallons, then it will be quite powerful for your tank but it can be angled forwards and up so you deflect some of the flow and also get surface agitation. Remember though that sunsun are cheap replica koralias, to be honest for seven quid i would buy the koralia
Seffie x
Seffie x