Be surprised if anyone runs carbon with the possible exception of using it to remove meds. You'd be getting through a crapload of carbon, considering the size of the tanks and the bioload you're running. Water changes tend to rule.
"Free floating scrubbies that tumble in the water are the same concept as a bio reactor. I have a DIY moving filter bed/sump with K1 (again, same concept as a bio reactor). Can't say I love the design on the first try, but it does work, not alot of gunk builds up in it. Filter change is super easy. Definitely want to change the design when we get our own place, but really like how efficient and simple they are. One thing I may add is a pond canister filter between my return pump and the tank...wouldn't add much operating cost, just the UV light.Not to debate or derail Al, you were the first I expected to jab at us sump users. But to clarify something. I dont have a bunch of gunk in or below my scrubbies, I have pre filters in my Overflow boxes and 100 micron socks that catch anything before it reaches the scrubbies. My scrubbies are now freefloating and are allowed to tumble as the water circulates. I also have polishing pads which catch all debris in the FX5s and only need to be rinsed a few times a year. Dont know why you would tear them clompletely down. Havent had to in 3 years.
So no gunk in my filters......
K1 is open and hard media that allows the dead/uneffecient bacteria to fall off. A scrubbie is gonna trap this stuff and might move around but surely it wwon't tumble hard enough to loose this stuff."Free floating scrubbies that tumble in the water are the same concept as a bio reactor. I have a DIY moving filter bed/sump with K1 (again, same concept as a bio reactor). Can't say I love the design on the first try, but it does work, not alot of gunk builds up in it. Filter change is super easy. Definitely want to change the design when we get our own place, but really like how efficient and simple they are. One thing I may add is a pond canister filter between my return pump and the tank...wouldn't add much operating cost, just the UV light.