hi there i have been using algae surubber for less then 1 yr more then 6 mth but currently my scrubber have very little algae on it last time there is so many green green algae. light supply 24w warm white one side 18w pure white (daylight i think) one another side but recently it grow grape a like thing. very very little algae ready. how ever my tank doesnt have much algae. i hardly have to wipe the glass. what are this thing below, is stuck in the mess, hard to rem