I bought a big used custom Euroreef skimmer. It's 2 years old and is a 12"
diameter X 33" high model and uses two Sedra 9000 pumps, this thing should
skim the heck out of the new 240 Gallon reef I'm setting up. Only problem
is the bottom and insides of the skimmer body as well as the entire outside
(and possibly the insides) of both pumps are completely encrusted with small
calcium bodies that I assume are from tiny feather duster worms. The inside
bottom of the skimmer is also completely covered in them and even has some
of the large feather duster shells stuck to it. These things are stuck on
there like mortar. I can probably scrape some of it off (with great
difficulty) but I can't really get to the bottom of the skimmer, (arm too
big, won't reach) and I'm also worried about the internal parts of the
pumps. Does anyone know something I can soak the pumps and the skimmer in
that will dissolve/break up the calcium deposits without damaging the
skimmer or pumps and that can be rinsed away and not leave any residue that
might be able to get into the system and poison/contaminate it when I start
setting it up in a couple of weeks? Thanks in advance for all your replies!