ok I am looking for step by step directions on how to make a freshwater sump for my 180 tank, I looked up here but did not find any. Does anybody know any links or could point me in the right direction
I would stick with canisters on a FW tank. I would do a Fluval FX5 or a small pond filter that has a backwash option. Canisters are much more effective at mechanical filtration.
I wouldn't agree. It is hard to not have more than enough biomedia in a large canister (especially something like the FX5). I have never heard of anyone with a large canister not being able to cycle the tank. The bacteria in a sump may run a little more efficiently, but it is also more maintenance to keep the old school bioballs clean of debris. I just think the biological is no issue, add a bunch of biomedia. The mechanical is so important that it is definitely worth going with a canister.
The backwash option on a small pond pump is amazing. Drain the tank for a water change while simultaneously cleaning the filter.