So I was thinking of picking up a (hopefully) pair of twinspots mainly for sand-sifting duty. I do have a few concerns since I've read some accounts of them slowly starving etc. This, coupled with the fact that I have a scooter "blenny" and a mandarin in the tank already (both chow down on frozen mysis readily) has me a little worried. I know the 2 of them still continually pick at the rocks/sand,but I do have a large portion of the tank covered in macro algae/rubble to help with this. Piscine tankmates are: 2x clowns, sm niger trigger, med lawnmower, 2x baby banggai, scooter blenny, mandarin. I know I'm pushing the bioload limit here, especially as the trigger and banggai's mature, but then that's the excuse to upgrade, right? So any thoughts on the feeding necessities of the twinspots/possible agression. And will they sift sand (40g long 4'x1' footprint) near the efficiency that say, a diamond goby (Valencienna puellaris) would? Any other thoughts, concerns.