I've decided to connect the 90 gallon sump that came with my 220 gallon tank. The original owner used the tank to house Africans, but I am currently keeping my P. friedrichsthalli in it. When last used, the sump simply had a divider in the middle of it to within an inch of the top. The left half was being used as a refugium/time out tank for the guy's aggressive fish. The right half has no baffles or anything in it, and I do not recall what he had for media in it...some bio balls I think. Could anyone suggest how I should set this sump up? I have been researching this, but I am still not sure. I know I will need some baffles, and the current divider can easily be removing to "start over". Once I have settled on the design I will go get some glass and silicone everything together. Thanks.