Wow, i just got 20 of these for my 30gal fowlr on friday.. they are putting such a dent in my cyano problem, its crazy! im really happy with them, and i recommend them to anyone who's got detritus/algae issues. it seems like over the past couple days, my tank has been noticeably cleaner every time ive looked at it. and the snails aerate the sand bed.. overall a great addition.
