Does this Walex Commando product require filling the tank, adding the Commando Black and leaving it set (work) for 12-24 hours?
Walex CMDOBG Commando Black Holding Tank Cleaner
Question ID: 2120346 Status:
Open May 10, 2016 - 09:36 AM
Sanitation > RV Toilet Chemicals
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May 10, 2016 - 10:02 AM
Yes, for most tanks with minimal build up, add a Commando drop-in and fill the black tank completely. Let sit for 24 hours for best results and flush tank. If it is really bad, it may take a second cleaning to remove all of the build up.
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