Thank you for all your suggestions 
,seem like the rock should be taken away,just for you all a information,that's a crystal which i collected over a mining moutain few years ago.i just bought few tiger shirms for this small little tank.about the rock ,maybe i will replace it with some "dark green" riccia,can anyone tell me the actual name for "dark green" riccia...
,seem like the rock should be taken away,just for you all a information,that's a crystal which i collected over a mining moutain few years ago.i just bought few tiger shirms for this small little tank.about the rock ,maybe i will replace it with some "dark green" riccia,can anyone tell me the actual name for "dark green" riccia...
