SO I HAVE LITTLE FEATHER DUSTERS ON MY LR. ALL DIFF COLORS. WHITE, BLUE, RED, AND BROWN. THEY ARE SMALL. SMALLER THAN A DIME. ARE THEY GOOD. WILL THEY BECOME BIGGER. SHOULD THE BE ALL THESE COLORS. ALSO NOTICED LOTS OF CRITTERS THAT I THINK ARE PODS. LOOK LIKE LITTLE SHRIMPS. MY CALCIUM LEVEL IS 400PPM. IS THAT GOOD? ALSO NOTICED SOME RED ALGE ON THE SAND. DO I NEED SOME SAND SIFTERS? IF SO WOULD A BLUE HERMIT HELP? :feedback: