So I got a bamboo shrimp yesterday and he's beautiful. He's been sifting around in the sand a lot, but also filter feeding under the outputs for my filters. I spot fed him last night and this morning but I don't know how to tell if I'm giving him enough. I obviously don't want to pollute the water. I definitely saw some of the crushed flake food in his fans after I spot fed him, so I know he got some, but he's been sifting at the sand too so does that mean he definitely didn't get enough food? How often should I spot feed? I have good filtration in my tank and a fair amount of current. It makes me concerned to see him sifting.