Just as the title says. Has anyone tried their attack packs? either for algae or detritus. They seem quite large. 15 hermit crabs, 30 turbo snails, and 50 dwarf hermits. thats 95 total! just for a 75 gallon tank. has anyone bought one of these packages? im having problems with dirty sand and very brown dirty rocks....so i want it gone. opinions please!!!!!