Messing In Boats wrote:
I just asked her that very question, as I have a holding tank with lots
of "residue" in it that prohibits an accurate reading of its level. She
suggests putting some Wisk detergent in it to slosh around and clean up
the greasy residue so that i can see how much stuff i have in it.

Detergent will emulsify any buildup of animal fats (present in
waste)...which makes it effective when it comes to unclogging holding
tank sensor sending units...but to my knowledge, it won't do a thing
when it comes to dissolving sludge in holding tanks.

As with most problems, the best cure is prevention...as described in my
first reply to this thread.

Peggie
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Peggie Hall
Specializing in marine sanitation since 1987
Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and
Other Sources of Aggravation and Odor"
http://www.seaworthy.com/html/get_ri...oat_odors.html