I have both a Tunze 6060 & a Seio 1500 in my 100g FOWLR & if I could afford it, I would love to go with just the proven Tunze, but since I can't, I've been quite pleased with the performance of the Seio. If you remove most of the outer coverings, the Seio is just a little bigger than the Tunze, but the Tunze uses only 13w/hr
Anthony