Allright, I found the culprit, little red wigglers or at least the
aquatic equivalent. Neat huh! I like the idea of a very live and
active substrate. Teh substrate was potting soil with a 1.5-3"
overlay.
[Sajjad] That's neat.
The gravel is 3-5mm white quartz gravel. I guess the worms got in
with the plants that I put in there.
[Sajjad] Probably, these are nematodes that were in the soil.
Now is there a way to keep the dirt on
the bottom and the gravel on the top? I thought about putting a
relatively thick layer of sphagnum between layers but I doubt that
would work.
[Sajjad] Polyester batting or old filter pads might be better.
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