The 750 gal FOWLR tank I am setting up uses 2 Rainbow Lifeguard 40w units, I also run a 20w unit on the tank I set up for my parents. I have installed quite a few Coralife Turbo Twist units on clients ponds and have found them to be effective and reliable. Stay away from the Laguna line of sterilizers, have had nothing but problems with those POS.
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