I've been religious about doing minimum of 15%, with mainly all being 20% pwc
's. When I cleaned my sump I only did a 10%. Other than that it has always been more.
Pair B&W clowns
McKosker's Flasher Wrasse
Midas Blenny (Added this morning)
(2) Green Chromis (removed this morning)
Derasa Clam (if that counts)
Scarlet Cleaner shrimp
(2) emerald crabs
(2) pepperment shrimp (added this morning)
Std. CUC of snails / hermits
Also, when I do my PWC
's I am very careful not to stir up the sand bed. I typically pour quite slowly over at the back near the overflow.
My 1st PWC
, I dumped in the front and caused a sandstorm, so now I am more careful.