I have a 100 gallon trough full of some LR. Some of it is brand new pieces of marco rock and the rest is LR from my old setup. Its a mixture of lace rock and marco. I have been running a skimmer and GFO on this tub for 4 months with heat and good flow. So it should be nice and clean, 0.00 phos readings. $90 takes it all. Come get it!
