seems that might be the case as my tank is almost one year old now...
you also see them under the rock where the hairy mushroom is at
i've also got a lot of brown algae growing on my sand and rocks and can't seem to get rid of it...i bought 6 cerith snails about a week ago and has been cleaned yet?
guy at the lfs
says its from excess nutrients but my calcium is at 500 ppm
which is just slightly higher than its suppose to be...my dkh
is a little low at 8 and all other water parameters are where they're suppose to be except for nitrates which don't seem to drop below 20ppm