This was a replacement for a much larger (18 inch) reactor that needed a $$$ pump to get the pellets moving a bit. The reactor arrived in perfect condition, everything is fine. parts. Just flush, remove the logo decal and fill with current pellets and then into the sump. Takes up less space and doesn't require elbow pipe to direct outlet flow to the skimmer (cut just above the skimmer inlet) if you just want to make sure it goes there. Opening the bottom mm by mm gave me the right flow and the top doesn't come loose when adjusted. Just a note - remove the pump guard to attach to the base plate and rotate. Toggle on/off to adjust the flow so the pellets sink to the bottom at any setting Tank size 90g / pan size 35g Great product!
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