well precisely...the word " smorgusborg " isn't helping me.
If you talking about corralimorphs, they rely on photosynthesis to get the majority of their food.
They're filter feeder and they can't handle big chunks. Zooplankton can be a monthly meal and you can use a seringe to target the animals, so you'll end up with less waste. Since you have a 10g maybe you should stop feeding the mush. It may pollute more than anything else.
Have you checked your ph, temp, salinity, nitrates, nitrites, ammonia levels ?