I'd call your's a 260g system, for purchase sake
The reason for halving a skimmer's rating, as far as I understand, is because many of the lower-end, less pricey skimmers have poor air intake values
Basically any skimmer under $500 needs it's rating cut in half
My Skimz SK181 Kone is rated up to 320g, but has only 540l/h of air intake, so I feel it's good up to 160g and works great on my 110g system
Most of the high-end skimmers are closer to or even over 1000l/h of air, so their ratings are pretty much bang on
About recycling skimmers ... I know nothing
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