Join Date: Feb 2013
Location: Eaton Rapids, Mi, USA
just a heads up, your fluval 305 will accept a "polishing pad" which will help. i also wouldn't worry about additional filtering or flow, the 305 is good for up to 70 gallons and pumps 260 gph. unless your tank is a lot larger than it looks, you should have plenty of filtering, unless all of your sponges are plugged (which doesn't seem likely with the tank being 3 months old)
a purigen pad might be helpful for future water clarity as well.