These things have been here for over 2years now when i first bought the tank. Havent seen them anywhere else in the tank.The green circle gets much brighter when lights are on.
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
should i try smothering the whole rock with putty, will be hard to remove that rock and put the scape the same as it supports like 30 lbs of rock.Looks like it to me