I have an overflow 210 gallon tank with two marineland tidepool two sumps filtering it. They have three 2 liter media boxes apiece plus a very larg biowheel. I am currently using a layer of foam, a layer of carbon or zeolite and a layer of 3 chemsorb pads.
This system with water changes works very well, but I am wondering if anyone has any ideas about a way to do things more biologically. Does anyone think it is possible to run a system like this on pure mechanical and biological filtration with no carbon? Frequent water changes would be a must, but I do that anyway. Is a rufugium an option? Mabye grow some java moss and anachras in the sumps? This is a heavilhy stocked tank, so keep that in mind. Any ideas would be great.
This system with water changes works very well, but I am wondering if anyone has any ideas about a way to do things more biologically. Does anyone think it is possible to run a system like this on pure mechanical and biological filtration with no carbon? Frequent water changes would be a must, but I do that anyway. Is a rufugium an option? Mabye grow some java moss and anachras in the sumps? This is a heavilhy stocked tank, so keep that in mind. Any ideas would be great.

I dont use carbon unless it is to remove medication and zeolite doesnt work well with biological filtration as it deprives the BB of their food source(ammonia), this causes the BB to die off rendering the biological filtration media useless.