my bad never used RSM. assume d it ment 130 gallon.
most I used it on was a 20 display and 10 sump.
and if I remember right there is no back chamber?
2 vertical chambers stacked up.
no actual pump to move water in/out, relies on diffusion.
Last edited by Rogue951; 05-15-2012 at 01:21 AM.
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