There’s a big difference between symptomatic mercury poisoning from significant absorption of mercury (which might call for treatment as described in the link above) and slightly elevated mercury levels (for which no treatment is called for, and is probably not very effective).
The amount of mercury you get from eating fish is not enough to cause medical problems in an adult (and I’m not sure the treatment would do much to lower these slightly elevated levels). If you’re not planning on being pregnant or breastfeeding, then don’t worry about it.
The only reason it’s an issue is that mercury is much more toxic to children and fetuses. But as far as I know, the only option is just to limit the amount of high-mercury fish (like Tuna and swordfish) that prospective mothers eat. And levels are such that limit means generally, ‘OK to eat scallops and bass once a week, but don’t live on tunafish every day’.