I have an Eheim 1250 I could use if it does not work. As far as the reactor is concerned, I have had lesser quality branded stuff that was difficult to seal and leaked more than one occasion, without going into any names, but between the twist lock top, the quality and weight of material and the fact that I have never had any of the GEO products leak, its worth it. Lets face it, if it takes too much time to do, or is difficult to clean, it wil not get done as often so the twist lock tops are great for me. I have little to no time to spend cleaning things.