I have a 20 gallon highly planted aquarium and i'm looking to replace my filter. I will say that the aquarium is pretty highly stocked with livebearers so more then likely there's a high bio-load. My main question is what aqueon HOB filter size you'd suggest. Im thinking the power 30 but wanted to know what you guys would suggest. Speedy replies are appreciated because my older one seems to not be holding out too well and I'd like to get it before the storm, thanks!