Join Date: Jun 2015
Location: Victoria, BC, Canada
I have this stratum in a shrimp tank. I just gently wave the siphon an inch or so above the substrate, this blows about some mulm which then gets sucked up. The stratum moves sideways a bit using this technique. Not enough to blow all over.
I use a Marina gravel vacuum, the kind that you plunge up and down to get going. It doesn't suck up the stratum, the vacuum is not that strong.
Other than that, the small bits of decaying matter etc just breaks down into the substrate and becomes plant food. Yes, I can see it below the top layer (through the glass), but then it's where the roots can get to it.
I don't have a cap on the substrate.
Daisy Mae V
According to my husband, I have a habit of jumping right in!