Mike O'Brien
New member
Crushed coral. I use a specimine container filled with CC and dolomite. It has holes drilled in the side. I have a small cup that hold's my probe sitting on top that the effluent drip's in, so after the cup the effluent flow's through more crushed coral to raise the ph a bit, then it drip's down into a very turbulent area, and hopefully through the skimmer.