Hmmmm........been on here 5 years. Didn't see it being a "rule of thumb". Yeah, I know "we" don't do most things the same as salties. I mentioned it because they have to be even more conscience of water due to salinity. Have had a 240 on a 50 gal sump successfully a long time.
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It's preferred, didn't say it wouldn't work. I know the OP and he cares about my input, so do what you want I don't care. Are you a troll or a know it all? I don't care to get in a pissing contest with you over semantics.
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