I know this is an older thread, but Trigger. Actually Trigger and Leviathan are both great. All we know here is how long we've been in the industry and what we've seen. We've been selling aquarium supplies for 30 years. Maybe some owners aren't as active on the forums, but when you have a sump issue they are. We pay attention to how it gets shipped, if there's damage, how many complaints there are, how many compliments, the build quality, the reputation of the company, and just about every other aspect. It's TRIGGER lol How many complaints do you see about them on here? Zero? And they might be the most sold sump brand in the USA. We might even sell more than anyone else. But it's because we also are the only place that sells their blemished units and we're one of the only places that can have a Triggee custom built. If I had to guess I'd say we sold 500+ Trigger sumps last year, maybe...know how many complaints we had? Zero.