Well, here's the tank filter. It's covered with gelatinous goop that you couldn't scrape off. Ten minutes with a toothbrush and some diesel and it was good as new. The only PITA part was that the goo wasn't letting the rest of the fuel drain, so when I thought the tank was empty it wasn't
Getting at it was pretty easy, jack the car and access from behind right back wheel. The next pic is the filler, and the arrow is pointing at where algae is coming up out of the overflow hose like a damp black sponge. I used a bike brake cable with 3/8" of a few of the strands doubled back, letting it push through the spongy mass, then hook it as it was pulled out, and it brought out clot after clot. So if you're looking for some unexplained power drop, maybe do check the tank filter, but check the easy stuff first. And as you can see, you can't use the big bolt trick on a 126 filter