Thanks to both of you. I have 7 hermit crabs and 3 snails, or had I can't find one. I plan on getting more around the first when I get paid.
I'm glad it will work and do no harm, but in regards to the carbon.... am I really supposed to leave all mechanical filtration out for the 10 day treatment? The only filter pads I have, have carbon in it. In fact, after looking at pictures i'm pretty sure it isn't cyanobacteria. It's not red and thick like in the pictures.