PhunkeyPhish
Member
I use xport cubes in a reactor chamber in the sump for my 65 gallon reef tank. I recently had to add about 50% more cubes because I was noticing more algae on the walls and sand toward the end of the day (cleaner crew does a good job at night). It is back under control, but was curious as to how often these cubes should be replaced and if I can change all of them at once, or if I need to only change like half at a time? I would love to get a santa monico surf algae scrubber, but my wife has set a moratorium on any large purchases for the tank for a while 
