On 2 seperate occasions in the past, I've purchased an emerald crab because I was informed that they tend to eat bubble algea (which I have quite a bit of in my tank). In both instances the emerald crab would start to lose his coloring after being in my tank for about a month. It would fade from bright green to a dull green to really pale an eventually die. I'm guessing this is due to some sort of nutrient defficiency, but i'm not sure what that might be. Has anybody ever encountered this before and found a way to rememdy it? What do people feed these crabs?
Tank is 55 Gallon, 2 110 Watt VHO
(1 50/50 and 1 actintic). Live rock and protein skimmer in the sump for filtration. I have 1 Yellow Tang, 1 Percula clown and a cardinal. I've got a seabae anemone i've had for almost 5 years now (how long do they live?), some finger leather corals (1 reproduced into 3), a purple mushroom which reproduced from 1 to probably 60 or 70 mushrooms (it spreads like a weed), 2 metallic green mushrooms, some green star polyps, some other green polyps which weren't named when I got them (got it from free off the bottom of a tank at the LFS
) and a stylophora coral.
I add calcium via a kalkwasser drip, strontium and iodine once per week and occasionally feed some phytoplankton. Othen then that I just do pwc
's every 2-3 weeks.