Have a rr 210 gallon oceanic, running a pro-clear 125 and a 175 on it for 2 month's. have about 1000 gph running over boi balls. how long till its established. run felt on drip trays. Tank has been up and running for two years now, just converted to trickle filters. also run around 1300 gph with powerheads. also run a auqua clear 110 for a little extra mechanical. tank is lightly stocked at this time. about 15 fish and some growing fry.