Calcium Reactor for 300 Gallon Aquarium

[turtleman9100]

Hello all. My tank is a 300 gallon cube 48X48X30 mixed reef. I have some lps, sps, clams and softies. My sump is about 50 gallons. I have no complaints. I am getting great color, polyp extension and growth out of all hard and soft corals. I currently use an Octopus kalk reactor via topoff and use IO salt for water changes bringing the calcium level up to 400 using calcium cloride. I've got a little extra money and 2 extra (FULL) CO2 tanks with regulators. I was thinking about adding a calcium reactor to my setup to keep my ph from climbing high at times and keep alk in check. What calcium reactor are you guys using for your big tanks and how are they working out for your setup?

 

[Untamed12]

I use a PM 6" x 18", with a 2nd stage that is 4" x 18". It keeps up with the demand on my 400 gallon tank...but only just.

I have purchased a GEO 8" x 18" to upgrade, but haven't needed to run it quite yet.

 

[Paulairduck]

I run a 818 on my 300 gallon, it is a rockstar, superstable