Bio balls will never clog. The surface area issue is a non factor seeing as a bio ball w/ no food or poo in it will always work better than a scrubby w/ food and poo in it any day. Anyone who has been running wet/dry filters for a while knows that no matter the amount of mechanical you have, crap still collects on the bottom of a wet dry unless you run scrubbies because it's not on the bottom, it's in your scrubbies. If your answer is a fine filter sock, how often do you clean it between water changes. A tedious fix to a bad / cheap alternative is not a fix in my opinion.