No, we have the AHEAD msd II system but, from my understanding, you can't use regular swimming pool chlorine tablets because they are not authorized for dumping into the lake, plus, if you mix them, there is a chemical incampatibility that may cause an explosion within your poop tank system.
If you don't know for certain, don't guess--or worse yet, just
assume-- that anything similar to what the instructions call
for will work. Contact the equipment mfr to ask them. Have the
MSDS--which you should be able to get--for the product in question
(in this case, the mfr of the 50 lb. bucket of tabs) handy when you
Peggie Hall, Moderator 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." [L=http://shop.sailboatowners.com/books/detail-books.htm?sku=66438&cat=1304[/L]