The "Junction" (Marshall Junction) is just a highway crossroads where a Fireworks/Gas Station store sits...nothing to get excided about, it's not worth a special trip...lol

Is your diffuser like this?...

[Linked Image from forums.pondboss.com]

If so, I would consider adding a "snow shoe" base to it as I described earlier to be on the safe side. It's foot print is not much bigger than the diffuser head (pretty small) and the diffuser will sit very close to the muck. A larger base will spread it's weight out over a larger area to keep it afloat in the soft bottom and protect the soft muck from the flow that the diffuser will cause reducing erosion around the assembly. A 2'x2' base sheet would work, maybe 18"x18". The caveat will be that the diffuser will be more difficult top drop to the bottom as it will not want to drop straight down, but rather glide back and forth (or maybe flip over). You'll know if it flips over...the air bubbles will be much larger and sporadic rather than a fine plume. I secure my diffusers to a couple cheap duck decoys with Well Pump Safety Rope (500' from Menards for 20$) so that I can pull them for cleaning or relocation. The rope lasts a couple years for sure before needing replaced. Side Note: the rope wants to float so I wire-tied a large washer to the rope about 2 feet from the duck so that I don't have the rope floating at the surface.
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