So I had this overflow box installed on my 30 gallon IM Aquarium, and I am still impressed. It sounds funny to be impressed by something as simple as an overflow, but this one is great. It has an extremely small footprint and connected easily to a standard drain tube. The best part is the return. For some design reason, the return flow is randomized, both in direction and flow. It surges, and flows wide to narrow, left and right. Now, it isn't as intense as an add on flow randomizer, but still noticable in the movement of my corals. I love this product. I highly recommend it for a small to nano reef tank.
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