Been having a hard time controlling my alk, nitrates, and phosphates last month or two. This has lead to browning out, burnt tips on a few of the deepwater acros, and overall dull color. Even though I should be trying to get things back to normal first, I could not pass up a great deal on a monster of a calcium reactor. Hooked it up last night and this morning. SRO CR5000D calc reactor, CarbonDoser regulator, and a ReefFanatic controller. The reactor is rated for 1000 gallons - it will probably be two years before I have to add media. I had to place it in an adjoining room and run the lines through the wall.