scott s Redtail Catfish MFK Member Sep 11, 2010 2,781 677 150 Indiana Mar 8, 2011 #11 You can also add a bubble disk under the submerged bio balls to get the BB the oxygen they need.
V VLDesign Silver Tier VIP MFK Member Mar 20, 2007 1,845 11 1,843 IL Apr 8, 2011 #12 Water that won't clear can also be phosphates. And all my scrubbies are submerged so I don't see a problem with media fully submerged.
Water that won't clear can also be phosphates. And all my scrubbies are submerged so I don't see a problem with media fully submerged.
P Piscine Feeder Fish MFK Member May 5, 2010 892 1 0 Northwestern Louisiana Apr 8, 2011 #13 I have used them in my sump in both ways, and have noticed no difference.
