I don't trust sponges enough. sumps and algae scrubbers man, that's where its at.From what I know eheims are the gold standard or were the gold standard when it came to canisters. In the recent years fluval has come around and made a big splash lol I personally wouldn't own any canisters. For a 75 gallon I would do sponge filters there is way too many pros with a sponge filter.