substrate cleaning question
I have a tank with the Seachem Aquasolum substrate. It is one of those buffering substrates that comes in little balls. The problem I am having is that it tends to "grow" stuff on it. There are many areas of my tank where it is bare substrate with no plants. In this area the Aquasolum seems to be ok. But near the base, and underneath the cholla logs, for example, is where there is some accumulation of shrimp poo and decayed wood bits. But this turns into some slimy sticky goo that grabs onto the substrate pellets when I try to remove it, and it also really stinks. I am worried about growing some "bad stuff".
Similarly, near the area where I feed the shrimp there are leftover crumbs and shrimp poo and this also turns into a sticky smelly goo. It's hard for me to vacuum this area because the goo sticks to the pellets, which are really light anyway. And when I vacuum, it kicks up a cloud of grossness.
Anyway, I just want to know what I should do about this. Some people say they never vacuum, but in my case things would get really gross. My two CRS shrimp died recently due to bacterial infection, so I wonder if this could have been the cause.