Hi I have an established 210g main display with mostly sps ,1st question is im adding a deep blue 60gal frag tank and wanted to but a 20g deep sandbed fuge between frag tank and main, will the new sand cause any harm to display(possible cycle) thx
2 is there any way to guard agaist a doser overdosing (bubblemagnus) just wonder if any controller will work thx
2 is there any way to guard agaist a doser overdosing (bubblemagnus) just wonder if any controller will work thx

