hi,
i'm using a 3 ft nisso tank n a eheim 2235. like wat brandon had said. it does well for ammonia n nitrites but u'll be left wif loads of nitrate to take care of... i'm having a hard time getting rid of the nitrates... other dan that, i dun hv any probs at all....
oh ya, becos the nisso has the plastic trimming on top, u'll probably hv to saw off some parts for the pipe dat connects to ur canister...